SSBOXES Chevy Silverado/GMC Sierra Crew Cab 2014-2018 Quad 8-Inch Ported Subwoofer Box

SSBOXES quad 8-inch ported subwoofer box fits 2014-2018 Chevy Silverado and GMC Sierra Crew Cab trucks under the rear seat.

Custom-Fit Quad 8-Inch Truck Subwoofer Enclosure

This front-firing ported enclosure is built for customers who want serious bass in a Chevy Silverado or GMC Sierra Crew Cab while preserving cabin space and rear-seat usability.

Vehicle Fitment

• Fits: 2014-2018 Chevrolet Silverado Crew Cab
• Fits: 2014-2018 GMC Sierra Crew Cab
• Location: Under rear seat
• Subwoofer layout: Four 8-inch subwoofers

Key Specs

• Brand: SSBOXES
• Box type: Ported subwoofer enclosure
• Air space: 2.6 cubic feet
• Mounting depth: 8.5 inch
• Material: MDF
• Made in USA

Best Use

Use this box for Silverado and Sierra truck audio builds that need loud bass, clean fitment, and a customer-friendly under-seat installation.