Top » Catalog » Chevrolet / GMC Sub Boxes » Silverado / Sierra Crew Cab » 2014-2018 GM Crew Cab » CRB14-LK2x8FFP

2014-2018 GM Crew Cab Dual 8 Ported Front Fire Box (Lift Kit Req'd) *New*



2014-2018 GM Crew Cab Dual 8 Ported Front Fire Box (Lift Kit Req'd) *New*

Fits: 2014-2018 GM 4 Door Crew Cabs
Also Fits 2019 Legacy Edition

Approx. Empty Weight: 48 lbs
All 3/4 MDF Construction
Glued AND Screwed
Installs under the rear seat.  
*A 2.5" Lift Kit Purchased separately
from LMI Welding Is Required*


Build Specifically to house Two
Beefy 8" subs with Large Magnet
Structures, ie JL 8w7, Sundowns, Skars etc.
Volume: 1.08 cu.ft. per sub, Internally braced
Ported to to manufacturers specs for Sundown or JL
For others, please provide specs during checkout.  
Standard cutout 7-1/8"
Optional cutouts available, see menu.
Finish: Carpet, Plush Light Tan Shown

Terminals: Heavy Duty Spring Type.
Subwoofers Sold Separately
Braced between all subs


Now there is a solution for those wanting to get HUGE bass in their trucks.  We are offering a new line of boxes that can fit those larger deeper 8" subs that wont fit in other boxes.  We are talking about JL Audio 8W7s and Sundown SA 8s and More.  By lifting the seat 2.5" with a custom lift kit from LMI welding, this opens up the under seat area and allows the proper space needed for these types of subs.  This box comes in a dual slot-ported configuration that will absolutely rock in your truck.  Besides being larger than ordinary boxes, our lift kit boxes are built like army tanks.  They are built completely from 3/4" MDF and are glued and screwed together, Internally braced and come with high end push style speaker terminals.  Thats what it takes to contain these massive subs and Subthump knows how to deliver.  






Available Options:
Speaker Openings:
Carpet Color:

More Images


Extra Info

There are currently no product reviews
Write a review on this product!

Extra Info
This product was added to our catalog on Thursday 03 May, 2018.
Notify me of updates to 2014-2018 GM Crew Cab Dual 8 Ported Front Fire Box (Lift Kit Req'd) *New*
Tell someone you know about this product.

 Add to Wish List 
 $395.00  Quantity:        
Customers who bought this product also purchased