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2014-2018 GM Crew Cab Quad 8 Front Fire Box (Lift Kit Reqd) *New*



2014-2018 GM Crew Cab Quad 8 Front Fire Box (Lift Kit Reqd) *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 Four
Beefy 8" subs with Large Magnet
Structures, ie JL 8w7, Sundowns, Skars etc.
Also fits Solobaric 8L7 
Volume: 1.25 cu.ft. per side, Internally braced
Select specific cutout size below.  
For others, please provide specs during checkout.
Sealed Box, We can not port this so plz dont ask.  
Finish: Carpet

Terminals: Heavy Duty Spring Type, 1 per side. 
Subwoofers not included. 
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, XV2s, Massive Audio Hippos, 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.  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:

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This product was added to our catalog on Monday 24 June, 2019.
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