2014-2018 Chevy Silverado & GMC Sierra Crew cab 4 door for four 8” sub woofers Ported Enclosure
Elite Audio Custom Ported Enclosure is the ultimate bass solution for 2014–2018 Chevy Silverado and GMC Sierra Crew Cab owners who refuse to compromise on performance. Precision-engineered to house four 8-inch subwoofers, this enclosure fits seamlessly under the rear seat without requiring any vehicle modifications. The front-firing, single-chamber ported design is specifically tuned to maximize the output of 8-inch drivers, delivering deep, aggressive bass that breathes new life into your truck's audio system. Proudly engineered in the USA using premium-grade MDF, this box provides the structural rigidity needed for high-excursion subwoofers while maintaining a sleek, factory-integrated appearance.
Key Features
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Precision Fitment: Designed exclusively for the 2014–2018 Chevy Silverado and GMC Sierra Crew Cab (4-Door).
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Quad 8" Configuration: Maximizes surface area for intense bass pressure without taking up the entire cabin.
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Front-Firing Ported Design: Optimized air displacement for higher output and better low-end extension.
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No Modifications Required: Fits directly under the rear seat, preserving your floor space and factory interior.
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USA Engineered: Built with premium high-density MDF for maximum durability and zero cabinet flex.
Technical Specifications
| Feature | Details |
| Subwoofer Size | 4 x 8" |
| Enclosure Type | Ported (Single Chamber) |
| Firing Direction | Front Firing |
| Total Air Space | 2.6 ft³ |
| Mounting Depth | 8.5" |
| Compatibility | 2014–2018 Silverado/Sierra Crew Cab |
Important Note
⚠️ Disclaimer: Due to the custom nature of this enclosure, all sales are FINAL. Please verify your subwoofer mounting depth and vehicle cab style before purchasing to ensure a perfect fit.
Free shipping is available within the 48 U.S. states. Orders placed before 11 PM ET are typically processed the next business day and arrive within 5–8 business days. Tracking information will be provided as soon as your order ships.
Need to make a change to your order? Contact us within 24 hours of purchase, and we'll be happy to help. Please note that orders already processed for shipment cannot be canceled.
1-Year Limited Warranty: As an authorized dealer, we provide a 1-year limited warranty covering manufacturer defects in materials and workmanship under normal use. The warranty does not cover physical damage, misuse, improper installation, or normal wear and tear.
Customer Support : 9:00 am to 5:00 pm
Address: 13446 Alondra Boulevard, Cerritos ,California 90703, United States
Email: info@eliteautogear.com
For technical support questions, contact us at cs@eliteautogear.com
Phone: (877)-215-8187
From Our Community
Real Installs. Real Sound.
See what enthusiasts are saying — straight from their builds
The Box Matters as Much as the Sub
Enclosures Built to the Right Volume and Tuning
Built to Spec
Internal volume and port tuning are set for the drivers it is designed around, which is what keeps bass tight instead of boomy.
Solid Construction
Braced panels and sealed joints reduce the flex and air leaks that rob output.
Check It Fits
Compare the listed outside dimensions and mounting depth with your vehicle space before ordering.
Ready to Wire
Terminal cup wiring keeps the install clean. Match the final impedance to what your amplifier is stable at.
