2008–2018 GM Crew Cab Triple Skar Audio EVL 8" Subwoofer Box Plans
Subwoofer Box Plans for (3) Skar Audio EVL 8" – Ported Truck Enclosure
Build a hard‑hitting, deep‑tuned ported enclosure for three Skar Audio EVL 8" subwoofers with these precision‑engineered subwoofer box plans designed specifically for the 2008–2018 Chevy/GMC Silverado & Sierra Crew Cab. This enclosure maximizes under‑seat airspace, airflow efficiency, and low‑end extension while maintaining full rear‑seat functionality.
The EVL 8 is known for its aggressive low‑end output, strong motor force, and impressive excursion. This enclosure provides the ideal airspace, port area, and tuning frequency needed to deliver loud, musical, and powerful bass inside the GM truck cabin.
Save Money — Build It Yourself
Stop wasting materials and guessing on dimensions. These DIY subwoofer box plans make it simple to build a professional‑grade enclosure at home — perfect for anyone wanting big bass without paying custom‑shop prices.
What’s Included
- Downloadable ZIP file
- Multiple 3D rendering images
- Detailed spec sheet with subwoofer & enclosure specs
- Professional optimized cut sheet with parts list
- Precision‑designed ported truck enclosure layout
Designed For
Triple Skar Audio EVL 8" Subwoofers – 2008–2018 GM/Chevy/GMC Crew Cab
- Woofer Type: (3) Skar Audio EVL 8
- Woofer Size: 8"
- Outside Dimensions: 11” FH x 8” RH x 54” W x 14”D
- Requires 2.5" Seat Lift
- Tuning: 33Hz truck‑optimized ported design
- Performance Notes: Engineered for aggressive low‑end output, strong cabin gain, and clean daily performance
May work for other 8" woofers — user discretion advised.
Why These Plans Perform
- Optimized specifically for triple Skar EVL 8s
- Designed to fit 2008–2018 GM Crew Cab with proper seat lift
- Ported layout maximizes airflow and reduces turbulence
- Smooth, predictable response thanks to proper port tuning
- Ideal for daily setups needing loud, musical, and deep bass
- Eliminates trial‑and‑error and prevents wasted materials