Add to Cart Compare Quick view Xtreme Enclosures VENTED 2014-2016 Chevy Silverado Crew and GMC Sierra Crew Sub Box MSRP: 1800woofers Price Now: $443.51 Was: 2014 GMC SIERRA CREW AND CHEVY SILVERADO CREW 1500 1/2 TON SERIES 2015-2016 GMC SIERRA CREW AND CHEVY SILVERADO CREW (ALL CREW MODELS) *THIS WILL NOT FIT SOME 2014 CHEVY SILVERADO CREW 2500 and 3500 SERIES Ported sub box Fits four 8 inch subwoofers... GMCRW2014 QUAD PORTED MSRP: 1800woofers Price Now: $443.51 Was: Add to Cart Compare Quick view