Ported Box for 1999-2006 Chevy Silverado Extended Cab

Ported Box for 1999-2006 Chevy Silverado Extended Cab

Xtreme EnclosuresCustom Built: Estimated lead time of 20-40 Business days.
SKU: CHEVY GM EC 99-06 PORTED LG In Stock
Regular price$479.70

A ported Silverado extended cab sub box for 1999-2006 trucks, including the GMC Sierra extended cab. It fits under the rear seat and runs two 8" or two 10" subwoofers firing forward, tuned to 38 Hz with 1.1 cubic feet of airspace per sub.

Fits

  • 1999-2006 Chevrolet Silverado extended cab
  • 1999-2006 GMC Sierra extended cab
  • 2007 extended cab in the old Classic body style
  • 2007 extended cab owners: check whether your truck is the new or the old body style before ordering, and call if unsure
  • Mounts under the rear seat

Specs

Subwoofers Two 8" or two 10"
Enclosure type Ported, subs fire forward
Airspace 1.1 cu ft per sub
Port tuning 38 Hz
Mounting depth 7"
Cutouts (standard) 8": 7"
10": 9 1/8"
Construction MDF, CNC precision cut, assembled by hand
Terminals Speaker terminals

Choosing your subs

Check that your subs are no deeper than 7", that their cutout matches the specs above, and that they suit 1.1 cu ft each at 38 Hz. Type your sub model in the "What Sub Model are you using?" box so the box is cut to match. Shop 8" subwoofers or 10" subwoofers.

Built to order

Built to order by Xtreme Enclosures: CNC precision cut from MDF and assembled by hand, then carpeted. Estimated lead time: 20–40 business days.

Questions before you order? Call SSA at (443) 345-1537 or email support@soundsolutionsaudio.com.

Sale Ends November 19th, 2026
Minimum Purchase of $349.00
*Applies to Mechman, SSA Limitless Lithium & XS Power Products ONLY
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A ported Silverado extended cab sub box for 1999-2006 trucks, including the GMC Sierra extended cab. It fits under the rear seat and runs two 8" or two 10" subwoofers firing forward, tuned to 38 Hz with 1.1 cubic feet of airspace per sub.

Fits

  • 1999-2006 Chevrolet Silverado extended cab
  • 1999-2006 GMC Sierra extended cab
  • 2007 extended cab in the old Classic body style
  • 2007 extended cab owners: check whether your truck is the new or the old body style before ordering, and call if unsure
  • Mounts under the rear seat

Specs

Subwoofers Two 8" or two 10"
Enclosure type Ported, subs fire forward
Airspace 1.1 cu ft per sub
Port tuning 38 Hz
Mounting depth 7"
Cutouts (standard) 8": 7"
10": 9 1/8"
Construction MDF, CNC precision cut, assembled by hand
Terminals Speaker terminals

Choosing your subs

Check that your subs are no deeper than 7", that their cutout matches the specs above, and that they suit 1.1 cu ft each at 38 Hz. Type your sub model in the "What Sub Model are you using?" box so the box is cut to match. Shop 8" subwoofers or 10" subwoofers.

Built to order

Built to order by Xtreme Enclosures: CNC precision cut from MDF and assembled by hand, then carpeted. Estimated lead time: 20–40 business days.

Questions before you order? Call SSA at (443) 345-1537 or email support@soundsolutionsaudio.com.

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We accept payments with :
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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

We accept payments with :
Visa, MasterCard, American Express, Paypal, Diners Club, Discover and more.

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