Check the listing for details. Chevy Silverado Gmc Sierra Single/ Ext Cab 88-94 Center Console Subwoofer Box. Condition: New. Listed at 289.00 USD. THIS CENTER SONSOLE WILL FIT ALL SINGLE CABS - CREW CABS - EXT CABS- QUAD CABS Enhance your music experience with this amazing 12" subwoofer box specially designed for your Chevy Silverado or GMC Sierra from 1988-1993. The box is compatible with a universal fitment, has a single port, and is optimized to deliver an incredible output of Mega Bass. Made in the United States, this speaker/sub enclosure is a top-of-the-line accessory for your vehicle's audio system. Whether you're cruising on the highway or stuck in traffic, this subwoofer box will provide you with the best sound quality possible. Upgrade your car audio and enjoy your favorite tunes like never before with this must-have addition to your Silverado or Sierra. -WOOFERS NOT INCLUDED SPEAKERS NOT INCLUDED. WE JUST SHOW ON PICTURES SO YOU CAN SEE HOW IT LOOKS INSTALLED—-Enclosure Measurements: Type of Enclosure: Vented Enclosure Sub Size: Single 12”Tweeter: (2) 3.5”Alt Speaker- (2) 6.5”Mounting Depth: up to 11.0”Gross Volume Per Sub (Measurement for the outer dimensions of the box): 2.73 Cubic Feet Net Volume Per Sub (Measurement for the outer dimensions of the box less the thickness of the wood): 2.05 Cubic FeetWOOFER CUT OUT 11.3"SPEAKERS CUT OUT 5.75"TWETERS CUT OUT 2.95"