1999-2006 & 2007 Classic Silverado Extended Cab Sub Boxes (Pair)

1999-2006 & 2007 Classic Silverado Extended Cab Sub Boxes (Pair)

Xtreme Enclosures
SKU: CHEVY GM EC 99-06 DUAL PAIR In Stock
Regular price$310.70

A pair of single sub boxes that together make a 1999-2006 Silverado extended cab sub box setup, also sized for the GMC Sierra extended cab and the 2007 Classic body trucks. Each box holds one 8", 10" or 12" sub firing down, with 0.7 cu ft of airspace per sub.

Fits

  • Chevrolet Silverado and GMC Sierra extended cab, 1999 to 2006
  • 2007 extended cab in the old Classic body style; if you are not sure which 2007 body your truck has, check before ordering
  • Does not fit the crew cab heavy duty models

Specs

Subwoofers Two (one per box): 8", 10" or 12"
Firing direction Down
Airspace 0.7 cu ft per sub
Mounting depth 7"
Cutouts Standard: 7" for 8s, 9 1/8" for 10s, 11 1/8" for 12s
Construction MDF, supplied as one pair of boxes

Choosing your subs

Each box allows 7" of mounting depth, so confirm your subs fit that and the standard cutout for their size. Type the sub model in the "What Sub Model are you using?" box when ordering so both boxes are cut to match. Shop 8" subwoofers, 10" subwoofers or 12" subwoofers.

Built to order

Built to order by Xtreme Enclosures as a matched pair in carpeted MDF. 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 pair of single sub boxes that together make a 1999-2006 Silverado extended cab sub box setup, also sized for the GMC Sierra extended cab and the 2007 Classic body trucks. Each box holds one 8", 10" or 12" sub firing down, with 0.7 cu ft of airspace per sub.

Fits

  • Chevrolet Silverado and GMC Sierra extended cab, 1999 to 2006
  • 2007 extended cab in the old Classic body style; if you are not sure which 2007 body your truck has, check before ordering
  • Does not fit the crew cab heavy duty models

Specs

Subwoofers Two (one per box): 8", 10" or 12"
Firing direction Down
Airspace 0.7 cu ft per sub
Mounting depth 7"
Cutouts Standard: 7" for 8s, 9 1/8" for 10s, 11 1/8" for 12s
Construction MDF, supplied as one pair of boxes

Choosing your subs

Each box allows 7" of mounting depth, so confirm your subs fit that and the standard cutout for their size. Type the sub model in the "What Sub Model are you using?" box when ordering so both boxes are cut to match. Shop 8" subwoofers, 10" subwoofers or 12" subwoofers.

Built to order

Built to order by Xtreme Enclosures as a matched pair in carpeted MDF. Estimated lead time: 20–40 business days.

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

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.

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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