{"title":"1999-2007 Classic Extended Cab","description":null,"products":[{"product_id":"99-06-gm-extended-cab-dual-10-downfire-with-amp-space-best-seller","title":"99-06 GM Extended Cab Dual 10 Downfire With Amp Space *Best Seller*","description":"\u003cp\u003e\u003cstrong\u003ePart #: CTB99-210Amp\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: small;\"\u003eFits: 99-06 and 07 Classic GM Extended Cabs\u003cbr\u003eMDF Construction\u003cbr\u003eApprox. Empty Weight: 33 lbs\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eInstalls under the rear seat\u003cbr\u003eNo modifications required\u003cbr\u003eDoes not affect rear seat latching\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eAmp shelf size: 18\"w x 13\"d\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eFits 8\" \u0026amp; 10\" round or square subs\u003cbr\u003eCutout Size: 18\"=7-1\/8\", 10\"=9-1\/8\"\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eMounting Depth: 6.5\"\u003cbr\u003eVolume: .7 cu.ft per chamber\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003eSealed Box, separated chambers\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eFinish: Carpet\u003cbr\u003eTerminals: Installed\u003cbr\u003e\u003cspan style=\"font-size: small;\"\u003eLogo Text: Optional\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003eSubwoofers Sold Separately\u003cbr\u003e\u003cbr\u003eNotice:  Please ensure your truck has the 99-06 style floor and trans tunnel under the back seat--as some 06 models have the newer body, ie 2007 style trans tunnel and seat setup which is much different.  We do not accept any responsibilty if your truck is an 06 model with newer body floor and seat.  \u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: x-small;\"\u003e\u003cspan style=\"font-size: small;\"\u003eThis custom mdf creation is the result of listening to what our customers really want in a box.  It's an innovative dual 10 downfire box with a cool spot in the middle to mount your amp. Has a mounting depth of 6-1\/2\" and each chamber has .70 cu.ft. of air space.  The amp shelf is approximately 18\"W x 13\"D. If you have a pair of 10s, but not a good spot to mount your amp, then this is the box for you.  This box is a hot commodity for these trucks.  In fact, it's our best selling chevy truck box period.  Not only does it look and fit great, but it adds a whole new dimension of functionality. It pounds incredibly hard and everybody loves it.  Nobody will believe there are only two 10s under your seat. This box is designed to fit perfectly under the rear seat with ZERO modifications.  It will \u003cspan style=\"text-decoration: underline;\"\u003enot\u003c\/span\u003e affect the operation of rear seat at all.  It will close and lock like normal.\u003cbr\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: x-small;\"\u003e\u003cem\u003e\u003cspan style=\"color: #008000; font-size: x-small;\"\u003eI just received the box today and man is it awesome. It fits perfectly under my back seat and the subs fit perfectly in the holes. I filled up the boxes with some polyfil and it sounds awesome! the bass gets so low even my tailgate rattles. Best box I've ever seen. thanks!      -Brian, Temecula, CA\u003c\/span\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan style=\"color: #008000; font-size: x-small;\"\u003eI loaded it (ctb99-210amp) with Memphis Audio MClass subs, and powered them with a Fosgate Punch P600.2. The results were breath taking (literally), and when my rear view mirror fell off and some kids 3 blocks away showed up to see where the bass was coming from came over, well I was very impressed. On top of the sound and quality put into this box the fit was perfect the back seat still goes down far enough to latch and is easy to access the straps to release it to pull it up, the only thing I can really say is.............................YOU GUYS BUILD A KICK ASS BOX!!!\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"width: 533px; height: 77px;\"\u003e\u003cem\u003e\u003cspan style=\"color: #008000; font-size: x-small;\"\u003eThank you,  Jack F.  Customer for LIFE..  Emmett, ID\u003cbr\u003e\u003cbr\u003eMy new sub box looks and sounds great thanks to you and your company. I gotta say I wanted BASS and now I got BASS. The whole set up looks fantastic in my 03’ Silverado. I put two 10” Kicker CVR’s and a Kicker ZX400.1 mono amp in this baby and man does it thump.  Phil M.  Fort Worth, TX\u003c\/span\u003e\u003c\/em\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Subthump.com","offers":[{"title":"Dual 10 inch Round \/ Charcoal Gray \/ none","offer_id":43862852403266,"sku":"CTB99-210Amp","price":259.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Charcoal Gray \/ Silverado","offer_id":43862852436034,"sku":"CTB99-210Amp","price":304.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Charcoal Gray \/ Sierra","offer_id":43862852468802,"sku":"CTB99-210Amp","price":294.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Light Gray \/ none","offer_id":43862852501570,"sku":"CTB99-210Amp","price":279.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Light Gray \/ Silverado","offer_id":43862852534338,"sku":"CTB99-210Amp","price":324.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Light Gray \/ Sierra","offer_id":43862852567106,"sku":"CTB99-210Amp","price":314.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Black \/ none","offer_id":43862852599874,"sku":"CTB99-210Amp","price":279.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Black \/ Silverado","offer_id":43862852632642,"sku":"CTB99-210Amp","price":324.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Black \/ Sierra","offer_id":43862852665410,"sku":"CTB99-210Amp","price":314.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Plush Light Tan \/ none","offer_id":43862852698178,"sku":"CTB99-210Amp","price":284.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Plush Light Tan \/ Silverado","offer_id":43862852730946,"sku":"CTB99-210Amp","price":329.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Plush Light Tan \/ Sierra","offer_id":43862852763714,"sku":"CTB99-210Amp","price":319.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Charcoal Gray \/ none","offer_id":43862852796482,"sku":"CTB99-210Amp","price":274.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Charcoal Gray \/ Silverado","offer_id":43862852829250,"sku":"CTB99-210Amp","price":319.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Charcoal Gray \/ Sierra","offer_id":43862852862018,"sku":"CTB99-210Amp","price":309.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Light Gray \/ none","offer_id":43862852894786,"sku":"CTB99-210Amp","price":294.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Light Gray \/ Silverado","offer_id":43862852927554,"sku":"CTB99-210Amp","price":339.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Light Gray \/ Sierra","offer_id":43862852960322,"sku":"CTB99-210Amp","price":329.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Black \/ none","offer_id":43862852993090,"sku":"CTB99-210Amp","price":294.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Black \/ Silverado","offer_id":43862853025858,"sku":"CTB99-210Amp","price":339.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Black \/ Sierra","offer_id":43862853058626,"sku":"CTB99-210Amp","price":329.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Plush Light Tan \/ none","offer_id":43862853091394,"sku":"CTB99-210Amp","price":299.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Plush Light Tan \/ Silverado","offer_id":43862853124162,"sku":"CTB99-210Amp","price":344.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Plush Light Tan \/ Sierra","offer_id":43862853156930,"sku":"CTB99-210Amp","price":334.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Square \/ Charcoal Gray \/ none","offer_id":43862853189698,"sku":"CTB99-210Amp","price":274.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Square \/ Charcoal Gray \/ Silverado","offer_id":43862853222466,"sku":"CTB99-210Amp","price":319.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Square \/ Charcoal Gray \/ Sierra","offer_id":43862853255234,"sku":"CTB99-210Amp","price":309.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Square \/ Light Gray \/ none","offer_id":43862853288002,"sku":"CTB99-210Amp","price":294.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Square \/ Light Gray \/ Silverado","offer_id":43862853320770,"sku":"CTB99-210Amp","price":339.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Square \/ Light Gray \/ Sierra","offer_id":43862853353538,"sku":"CTB99-210Amp","price":329.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Square \/ Black \/ none","offer_id":43862853386306,"sku":"CTB99-210Amp","price":294.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Square \/ Black \/ Silverado","offer_id":43862853419074,"sku":"CTB99-210Amp","price":339.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Square \/ Black \/ Sierra","offer_id":43862853451842,"sku":"CTB99-210Amp","price":329.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Square \/ Plush Light Tan \/ none","offer_id":43862853484610,"sku":"CTB99-210Amp","price":299.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Square \/ Plush Light Tan \/ Silverado","offer_id":43862853517378,"sku":"CTB99-210Amp","price":344.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Square \/ Plush Light Tan \/ Sierra","offer_id":43862853550146,"sku":"CTB99-210Amp","price":334.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Round \/ Charcoal Gray \/ none","offer_id":43862853582914,"sku":"CTB99-210Amp","price":274.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Round \/ Charcoal Gray \/ Silverado","offer_id":43862853615682,"sku":"CTB99-210Amp","price":319.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Round \/ Charcoal Gray \/ Sierra","offer_id":43862853648450,"sku":"CTB99-210Amp","price":309.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Round \/ Light Gray \/ none","offer_id":43862853681218,"sku":"CTB99-210Amp","price":294.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Round \/ Light Gray \/ Silverado","offer_id":43862853713986,"sku":"CTB99-210Amp","price":339.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Round \/ Light Gray \/ Sierra","offer_id":43862853746754,"sku":"CTB99-210Amp","price":329.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Round \/ Black \/ none","offer_id":43862853779522,"sku":"CTB99-210Amp","price":294.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Round \/ Black \/ Silverado","offer_id":43862853812290,"sku":"CTB99-210Amp","price":339.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Round \/ Black \/ Sierra","offer_id":43862853845058,"sku":"CTB99-210Amp","price":329.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Round \/ Plush Light Tan \/ none","offer_id":43862853877826,"sku":"CTB99-210Amp","price":299.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Round \/ Plush Light Tan \/ Silverado","offer_id":43862853910594,"sku":"CTB99-210Amp","price":344.0,"currency_code":"USD","in_stock":true},{"title":"Dual 8 inch Round \/ Plush Light Tan \/ Sierra","offer_id":43862853943362,"sku":"CTB99-210Amp","price":334.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/9271\/8402\/files\/210dfamp5.jpg?v=1781626460"},{"product_id":"99-06-gm-extended-cab-ultra-deep-dual-10-12-downfire-box-best-seller","title":"99-06 GM Extended Cab Ultra Deep Dual 10\/12 Downfire Box *Best Seller*","description":"\u003cp\u003e\u003cstrong\u003ePart #: CTB99-210\/212Ultra\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: small;\"\u003eFits: 99-06 and 07 Classic GM Extended Cabs\u003cbr\u003eMDF Construction\u003cbr\u003eApprox. Empty Weight: 35 lbs\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eInstalls under the rear seat\u003cbr\u003eNo modifications required\u003cbr\u003eDoes not affect rear seat latching\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eFits 10\" and 12\" round or square subs\u003cbr\u003eCutout Size: 10\"=9-1\/8\", 12\"=11-1\/8\"\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eMounting Depth: 7\"\u003cbr\u003e-based on 6\" magnet\u003cbr\u003eVolume: .92 cu.ft per chamber\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003eSealed Box, separated chambers\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eFinish: Carpet\u003cbr\u003eTerminals: Installed\u003cbr\u003e\u003cspan style=\"font-size: small;\"\u003eLogo Text: Optional\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003eSubwoofers Sold Separately\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eNotice:  Please ensure your truck has the 99-06 style floor and trans tunnel under the back seat--as some 06 models have the newer body, ie 2007 style trans tunnel and seat setup which is much different.  We do not accept any responsibilty if your truck is an 06 model with newer body floor and seat.\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eMany of our GM extended cab owners wanted us to design a box that could fit some of today's deeper, beefier subs.  This box is what we came up with.  This custom mdf dual downfire box has the deepest mounting depths possible to accommodate many of today's deeper subs.  Up to 7\" deep.  So if you have a pair of deep 10s or 12s, or you just need max air space for them, then this is definitely the box for you. \u003cbr\u003e\u003cbr\u003eThis is a two-chamber \u003cspan style=\"text-decoration: underline;\"\u003esealed\u003c\/span\u003e box with .92 cu.ft. of air space per chamber. And it pounds like no other.  It can even be cut to accept 10\" and 12\" Kicker Square Solobarics.  Simply select that option and we will cut the holes accordingly.  This box is a must-have if you like your bass low and extremely loud and don't like being limited to just a few shallow models of subs. This is by far our best selling x-cab box for this truck. Get yours today! \u003c\/span\u003e\u003c\/p\u003e\n\u003cp align=\"left\"\u003e\u003cspan style=\"font-size: x-small;\"\u003e\u003cspan style=\"font-size: small;\"\u003eLogo Edition boxes are Here.  A perfect way to personalize your box.\u003cbr\u003eYou may have noticed the Silverado logo on the box in the photos above.  That does not come standard on the box.  However, we now off the option to get either Silverado or Sierra put on your box.  If you would like that option on your box, simply select the check box to the right. \u003c\/span\u003e  \u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Subthump.com","offers":[{"title":"Dual 10 inch Round \/ Charcoal Gray \/ none","offer_id":43862855188546,"sku":"CTB99-210\/212Ultra","price":279.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Charcoal Gray \/ Silverado","offer_id":43862855221314,"sku":"CTB99-210\/212Ultra","price":324.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Charcoal Gray \/ Sierra","offer_id":43862855254082,"sku":"CTB99-210\/212Ultra","price":314.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Light Gray \/ none","offer_id":43862855286850,"sku":"CTB99-210\/212Ultra","price":299.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Light Gray \/ Silverado","offer_id":43862855319618,"sku":"CTB99-210\/212Ultra","price":344.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Light Gray \/ Sierra","offer_id":43862855352386,"sku":"CTB99-210\/212Ultra","price":334.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Black \/ none","offer_id":43862855385154,"sku":"CTB99-210\/212Ultra","price":299.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Black \/ Silverado","offer_id":43862855417922,"sku":"CTB99-210\/212Ultra","price":344.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Black \/ Sierra","offer_id":43862855450690,"sku":"CTB99-210\/212Ultra","price":334.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Plush Light Tan \/ none","offer_id":43862855483458,"sku":"CTB99-210\/212Ultra","price":304.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Plush Light Tan \/ Silverado","offer_id":43862855516226,"sku":"CTB99-210\/212Ultra","price":349.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Plush Light Tan \/ Sierra","offer_id":43862855548994,"sku":"CTB99-210\/212Ultra","price":339.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Charcoal Gray \/ none","offer_id":43862855581762,"sku":"CTB99-210\/212Ultra","price":294.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Charcoal Gray \/ Silverado","offer_id":43862855614530,"sku":"CTB99-210\/212Ultra","price":339.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Charcoal Gray \/ Sierra","offer_id":43862855647298,"sku":"CTB99-210\/212Ultra","price":329.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Light Gray \/ none","offer_id":43862855680066,"sku":"CTB99-210\/212Ultra","price":314.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Light Gray \/ Silverado","offer_id":43862855712834,"sku":"CTB99-210\/212Ultra","price":359.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Light Gray \/ Sierra","offer_id":43862855745602,"sku":"CTB99-210\/212Ultra","price":349.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Black \/ none","offer_id":43862855778370,"sku":"CTB99-210\/212Ultra","price":314.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Black \/ Silverado","offer_id":43862855811138,"sku":"CTB99-210\/212Ultra","price":359.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Black \/ Sierra","offer_id":43862855843906,"sku":"CTB99-210\/212Ultra","price":349.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Plush Light Tan \/ none","offer_id":43862855876674,"sku":"CTB99-210\/212Ultra","price":319.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Plush Light Tan \/ 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Empty Weight: 39 lbs\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eInstalls under the rear seat\u003cbr\u003eNo modifications required\u003cbr\u003eDoes not affect rear seat latching\u003cbr\u003eSeat will still go all the way down and latch\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eFits 10\" and 12\" round or square subs\u003cbr\u003eCutout Size: 10\"=9-1\/8\", 12\"=11-1\/8\"\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eMounting Depth: 8\"\u003cbr\u003eVolume: 1.13 cu.ft per chamber\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003eSealed Box, separated chambers\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eFinish: Carpet\u003cbr\u003eTerminals: Installed\u003cbr\u003e\u003cspan style=\"font-size: small;\"\u003eLogo Text: Optional\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003eSubwoofers Sold Separately\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eNotice:  Please ensure your truck has the 99-06 style floor and trans tunnel under the back seat--as some 06 models have the newer body, ie 2007 style trans tunnel and seat setup which is much different.  We do not accept any responsibilty if your truck is an 06 model with newer body floor and seat.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp align=\"left\"\u003e\u003cspan style=\"font-size: x-small;\"\u003e\u003cspan style=\"font-size: small;\"\u003eIntroducing the deepest box commercially available for your 99-06 and 07 classic GM extended cab pickups.  The Ultra Deep Maxx box is not only deeper than our Ultra Deep box, but has more volume and more clearance for your high powered subs.  Think of this box as our famous Ultra Deep box on steroids.  Now you can easily fit subs like JL 12w6 and Alpine type Rs in a box under the seat.  And since it's a downfire box, it stays completely under the seat and doesn't stick out and interfere with your rear passenger's leg room and the subs are hidden from view.  The best part is that it does not require a seat lift.  The seat will still close normally down to the stops and lock into place as usual.  This box uses 100% 3\/4\" MDF and is glued, countersunk and screwed, and caulked.  It is d\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size: x-small;\"\u003e\u003cspan style=\"font-size: small;\"\u003eeep enough to fit many of todays deeper, beefier woofers, including: 12\" Alpine Type R, 12\" JL Audio W6, 12\" Kicker CVX, And Many More. If you are serious about getting some major slam into your truck, then pick one of these bad boys up today.  \u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp align=\"left\"\u003e \u003c\/p\u003e\n\u003cp align=\"left\"\u003e\u003cspan style=\"font-size: x-small;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003cem\u003e\"Just installed my two CVR 12s in this Ultra Deep Maxx box.  Wow this is definitely a quality box.. I'll never get another cheapo box again..there's a reason those other boxes only cost 100$ thanks for the best sounding bass I've ever had\"\u003cbr\u003e\u003c\/em\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Subthump.com","offers":[{"title":"Dual 10 inch Round \/ Charcoal Gray \/ none","offer_id":43862924230722,"sku":"Ultra MAXX","price":339.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Charcoal Gray \/ Silverado","offer_id":43862924263490,"sku":"Ultra MAXX","price":384.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Charcoal Gray \/ Sierra","offer_id":43862924296258,"sku":"Ultra MAXX","price":374.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Light Gray \/ none","offer_id":43862924329026,"sku":"Ultra MAXX","price":359.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Light Gray \/ 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MAXX","price":409.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Round \/ Plush Light Tan \/ Sierra","offer_id":43862924591170,"sku":"Ultra MAXX","price":399.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Charcoal Gray \/ none","offer_id":43862924623938,"sku":"Ultra MAXX","price":354.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Charcoal Gray \/ Silverado","offer_id":43862924656706,"sku":"Ultra MAXX","price":399.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Charcoal Gray \/ Sierra","offer_id":43862924689474,"sku":"Ultra MAXX","price":389.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Light Gray \/ none","offer_id":43862924722242,"sku":"Ultra MAXX","price":374.0,"currency_code":"USD","in_stock":true},{"title":"Dual 10 inch Square \/ Light Gray \/ Silverado","offer_id":43862924755010,"sku":"Ultra 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MAXX","price":414.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/9271\/8402\/files\/maxx1sm.jpg?v=1781626809"},{"product_id":"99-06-silverado-sierra-extended-cab-single-12-ultra-w-amp-shelf","title":"99-06 Silverado\/Sierra Extended Cab Single 12\" Ultra w\/ Amp Shelf","description":"\u003cp\u003e\u003cstrong\u003ePart #: Ultra-Amp\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFits 1999-2006 And 2007 \"Classic\" Extended Cab Silverado And Sierra\u003cbr\u003e\u003cbr\u003eMDF Construction\u003cbr\u003eApprox. Empty Weight: 33 lbs\u003cbr\u003e\u003cspan style=\"font-size: small;\"\u003eInstalls under the rear seat\u003cbr\u003eNo modifications required\u003cbr\u003eDoes not affect rear seat latching\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eFits One 10\" or 12\" round or square subs\u003cbr\u003e*Cutout Size: 10\"=9-1\/8\", 12\"=11-1\/8\"\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eMounting Depth: 7\"\u003cbr\u003e-based on 6\" magnet\u003cbr\u003e*Volume: .92 cu.ft per chamber\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003eSealed Box\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003eFinish: Carpet\u003cbr\u003e*Carpet color shown: Charcoal Gray\u003cbr\u003eTerminal: Installed\u003cbr\u003e\u003cspan style=\"font-size: small;\"\u003eLogo Text: Optional\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003eSubwoofers Sold Separately\u003cbr\u003e\u003cbr\u003e* indicates a customizable field\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan style=\"font-size: small;\"\u003eOur Ultra-Amp box is essentially our Ultra Deep box (item ctb99-210\/212 Ultra) with have the box being a sub enclosure and the other half being an amp shelf.  The box fits exactly the same as the dual box and with the seat down, will look identical as well.  The volume is customizable too, but note that that amp shelf and enclosure grow and shink in inverse proportion.  \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Subthump.com","offers":[{"title":"Single 10 inch Round \/ Charcoal Gray \/ none","offer_id":43863002710082,"sku":"Ultra-Amp","price":175.0,"currency_code":"USD","in_stock":true},{"title":"Single 10 inch Round \/ Charcoal Gray \/ Silverado","offer_id":43863002742850,"sku":"Ultra-Amp","price":210.0,"currency_code":"USD","in_stock":true},{"title":"Single 10 inch Round \/ Charcoal Gray \/ Sierra","offer_id":43863002775618,"sku":"Ultra-Amp","price":200.0,"currency_code":"USD","in_stock":true},{"title":"Single 10 inch Round \/ Black \/ none","offer_id":43863002808386,"sku":"Ultra-Amp","price":195.0,"currency_code":"USD","in_stock":true},{"title":"Single 10 inch Round \/ Black \/ Silverado","offer_id":43863002841154,"sku":"Ultra-Amp","price":230.0,"currency_code":"USD","in_stock":true},{"title":"Single 10 inch Round \/ Black \/ Sierra","offer_id":43863002873922,"sku":"Ultra-Amp","price":220.0,"currency_code":"USD","in_stock":true},{"title":"Single 10 inch Round \/ Light Gray \/ none","offer_id":43863002906690,"sku":"Ultra-Amp","price":195.0,"currency_code":"USD","in_stock":true},{"title":"Single 10 inch Round \/ Light Gray \/ Silverado","offer_id":43863002939458,"sku":"Ultra-Amp","price":230.0,"currency_code":"USD","in_stock":true},{"title":"Single 10 inch Round \/ Light Gray \/ Sierra","offer_id":43863002972226,"sku":"Ultra-Amp","price":220.0,"currency_code":"USD","in_stock":true},{"title":"Single 10 inch Round \/ Plush Light Tan \/ none","offer_id":43863003004994,"sku":"Ultra-Amp","price":200.0,"currency_code":"USD","in_stock":true},{"title":"Single 10 inch Round \/ Plush Light Tan \/ Silverado","offer_id":43863003037762,"sku":"Ultra-Amp","price":235.0,"currency_code":"USD","in_stock":true},{"title":"Single 10 inch Round \/ Plush Light Tan \/ Sierra","offer_id":43863003070530,"sku":"Ultra-Amp","price":225.0,"currency_code":"USD","in_stock":true},{"title":"Single 12 inch Round \/ Charcoal Gray \/ none","offer_id":43863003103298,"sku":"Ultra-Amp","price":175.0,"currency_code":"USD","in_stock":true},{"title":"Single 12 inch Round \/ Charcoal Gray \/ Silverado","offer_id":43863003136066,"sku":"Ultra-Amp","price":210.0,"currency_code":"USD","in_stock":true},{"title":"Single 12 inch Round \/ Charcoal Gray \/ Sierra","offer_id":43863003168834,"sku":"Ultra-Amp","price":200.0,"currency_code":"USD","in_stock":true},{"title":"Single 12 inch Round \/ Black \/ none","offer_id":43863003201602,"sku":"Ultra-Amp","price":195.0,"currency_code":"USD","in_stock":true},{"title":"Single 12 inch Round \/ Black \/ Silverado","offer_id":43863003234370,"sku":"Ultra-Amp","price":230.0,"currency_code":"USD","in_stock":true},{"title":"Single 12 inch Round \/ Black \/ Sierra","offer_id":43863003267138,"sku":"Ultra-Amp","price":220.0,"currency_code":"USD","in_stock":true},{"title":"Single 12 inch Round \/ Light Gray \/ none","offer_id":43863003299906,"sku":"Ultra-Amp","price":195.0,"currency_code":"USD","in_stock":true},{"title":"Single 12 inch Round \/ Light Gray \/ Silverado","offer_id":43863003332674,"sku":"Ultra-Amp","price":230.0,"currency_code":"USD","in_stock":true},{"title":"Single 12 inch Round \/ Light Gray \/ Sierra","offer_id":43863003365442,"sku":"Ultra-Amp","price":220.0,"currency_code":"USD","in_stock":true},{"title":"Single 12 inch Round \/ Plush Light Tan \/ none","offer_id":43863003398210,"sku":"Ultra-Amp","price":200.0,"currency_code":"USD","in_stock":true},{"title":"Single 12 inch Round \/ Plush Light Tan \/ Silverado","offer_id":43863003430978,"sku":"Ultra-Amp","price":235.0,"currency_code":"USD","in_stock":true},{"title":"Single 12 inch Round \/ Plush Light Tan \/ Sierra","offer_id":43863003463746,"sku":"Ultra-Amp","price":225.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/9271\/8402\/files\/ultraamp1sm.jpg?v=1781627131"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/9271\/8402\/collections\/2022_Chevrolet_Silverado_2500HD_High_Country_2C_Front_Left_2C_11-21-2021_5738b906-0e82-4fee-8005-03d675f6d0ba.jpg?v=1780687872","url":"https:\/\/subthump.com\/collections\/1999-2007-classic-extended-cab.oembed","provider":"Subthump.com","version":"1.0","type":"link"}