Q Power QBomb Easy Set Dual Ported 12 inch Subwoofers Box Enclosure Car Audio with Bedliner Spray for GMC Chevy Crew Cab 2007-2013

Ummm... How do I put this? PERFECT FIT! 2008 GMC Sierra Crew Cab. MUST use Shallow Mount Subs and you are good to go. Fits flush with the back seats and minimal rise with the proper adjustments.Update: 3 weeks into using this box and MAN!! They are letting these Sundown live up to their full potential. And if you underseat, down fire, shallow mount subs are literally a bass killer. The whole setup just muffles the crap out of bass and it hard to get them to hit without adding extra power.Well NOT in this box. The legs allow for the proper excursion for shallow mounts. Simply put, it just SLAMS!!! Do t listen to the Bay Sayers saying "do not get this box" Blah blah blah. BUY THIS ONE! THIS IS THE ONE!!!!!

Fits in my 2011 gmc crew cab and was built good very happy

this box is the worst I do not recommend it at all it has whole bunch of seal issues made of horrible material ain’t even wood don’t listen too all the comments that say oh it’s a great box cause trust me it’s not I do not recommend y’all wasting y’all money in this trash ass box.This box is straight up trash.I bought this box for my 2010 Sierra crew cab and install 2 12 kickers brand new and next thing when I stared playing music it was rattling so much it would killed the bass.I was looking too see why it was doing that and no it was not my subs it was the box cause it was not seal right that’s why I recommend don’t spend your money on this trash ass box trust me 100%

I received this item opened box and was very disappointed box was badly damaged

Most ppls issues seem to be item arriving damaged and after receiving mine I can see why. Zero padding or protection for thr enclosure its just slid inside a box and wasn't even taped up very well(one end was completely open) I got lucky and mine was not damaged. Where mine was kinda damaged is whenever they pre installed the terminals they misaligned it pretty bad so hopefully the thin gasket on the terminal cups will help make that no issue but we will have to see. The terminals don't even come with speaker wire attached so it's weird they pre installed them anyways knowing u will have to remove em to wire it up.....so just weird. But oh well box is very nice and I'm happy with it other then those 2 issues! I'll update after install if there are any issues with the box sealing or fitting under my seats properly. Definitely a fan of the bedliner over the carpet style boxes!

This box fitted just as it should. Love the quality.

Box is only 1/2" particle board and 1/4" behind the speaker holes creating a lot of flex and diminshing bass resonance. The Bed Liner coating has a lot of blemishes. It's also a very shallow box so double check your mounting depth measurements. I had to add 3/4" rings of plywood for spacers to make my speakers work decent box for the price it only saved me time from having to build it myself..

Great product! Fast shipping!!