2019-2023 Chevy Silverado/GMC Sierra Crew Cab Quad 8" Ported Sub Box | Skar Audio
Single 10" Custom Kerf Ported Subwoofer Box - Down4Sound Shop
Amazon.com: QPower QBOMB12V Dual 12 Inch Subwoofer Box with Bedliner Spray for Speakers, High-Performance Vented Subwoofer, Durable Sub Box, Black : Electronics