Give your GM or Chevy crew cab pickup truck a boost of audio power with the QPower QBomb 2 Hole 12 Inch Ported Subwoofer Enclosure. This up firing under seat sub box is compatible with 2014, 2015, 2016, 2017, and 2018 Chevy Silverado Crew Cab and GMC Sierra Crew Cab trucks, and gives you the perfect platform to install 12 inch subwoofers for high quality bass.This subwoofer enclosure is ported, and features 2 openings for 2 subwoofers to be installed into. A mounting depth of 5 inches gives you added flexibility and it is finished with durable bed liner. Put a better box in your truck to get more out of your audio with the Q Power 2 Hole 12 Inch Ported Subwoofer Enclosure for 2014-2018 GM/Chevy Crew Cabs.