The QBGMC142104DR is a custom-fit underseat subwoofer enclosure designed specifically for 2014-2018 Chevrolet Silverado and GMC Sierra Crew Cab trucks. Engineered for strong low-frequency performance while preserving factory interior space, this enclosure features a downfire design that protects the subwoofers while delivering deep, clean bass output. Features & Benefits Custom-fit enclosure for 2014-2018 GM Crew Cab trucks Designed for dual 10-inch subwoofers Downfire subwoofer configuration Underseat mounting design Heavy-duty MDF construction Maximizes bass while maintaining cabin functionality OEM-style fit and appearance Durable automotive-grade carpet finish Excellent for stealth-style audio upgrades Specifications Product Type: Vehicle-Specific Subwoofer Enclosure Model: QBGMC142104DR Subwoofer Compatibility: Dual 10-inch subwoofers Enclosure Type: Downfire / Sealed Vehicle Fitment: 2014-2018 Chevrolet Silverado Crew Cab 2014-2018 GMC Sierra Crew Cab Mounting Location: Under rear seat Construction Material: MDF wood Finish: Black automotive carpet Air Space: Approximately 0.85–1.0 cubic feet per chamber Maximum Mounting Depth: Approximately 5 inches Configuration: Dual chamber enclosure Vehicle Compatibility Compatible with select: Chevrolet Silverado Crew Cab GMC Sierra Crew Cab Designed specifically for full 4-door Crew Cab models. Fitment may vary depending on factory storage trays, Bose audio systems, seat brackets, and trim configurations.