Ported Dual Sub box

NASTY IS ALL WE HAVE TO SAY HERE... A QUAD 6.5" PORTED SUBWOOFER BOX FOR THE 07-13 EXTENDED CAB. SIDE LOADING VENT AIRSPACE .75 PER SIDE TUNED TO 34 HZ  

2007-2013 GMC Sierra and Chevy Silverado Extended cab dual ported sub enclosure Note: This does not fit 2007 Old Classic Body Style. If you have the 2007 Extended Cab please check to see if you have the new or old body style. If u…