Check the listing for details. Sub Woofer Box Chevy Silverado 19-22 Crew Cab 4x8 Woofers Front Fire Ported. Condition: New. Listed at 229.00 USD. Experience premium audio quality with this double ported sub woofer box designed for Chevy Silverado 19-22 Crew Cab. The box is made with high-quality MEGA BASS brand material to ensure maximum durability and impeccable sound performance. Measuring 8” inch speaker size, this sub woofer box is perfect for fitting under the seat of your Chevy Silverado. The box is expertly crafted for front fire ported fitment and is compatible with Chevrolet vehicles. Manufactured in the United States, this sub woofer box promises to provide you with the best audio experience while driving. Get this top-of-the-line car audio accessory for your Chevy Silverado now! 49 WIDE X 10.5 HIGH X DEEP 15"WOOFER DEEP 7.5" WOOFER CUT OUT 9.35" ----WOOFERS NOT INCLUDED WE JUST SHOW THEM INSTALLED SO YOU CAN SEE HOW IT LOOKS---