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Enclosures - Xtreme Enclosures™ (Vehicle Specific) - Truck Sub Boxes - GMC - SIERRA EXTENDED CAB - 1999-2006 EXTENDED CAB - SSA STORE

1999-2006 EXTENDED CAB

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1999-2006 Silverado Ext. Cab Quad 8" Vented Box

1999-2006 Silverado Ext. Cab Quad 8" Vented Box

$399.99 $299.99
This is probably one of the loudest setups you can have in this truck. 4 8S UNDER THIS SEAT IS CRAZY LOUD. WE BRACE AND GLUE THESE BOXES TO MAKE SURE YOU GET YOUR MONEYS WORTH. WE CUSTOM TUNE EACH ONE AND HAVE NOTHING BUT STELLAR REVIEWS OF THIS BOX...
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2003-2006 GMC Sierra 1500 non-HD Console Enclosure
2003-2006 GMC Sierra 1500 non-HD Console Enclosure
2003-2006 GMC Sierra 1500 non-HD Console Enclosure
2003-2006 GMC Sierra 1500 non-HD Console Enclosure

2003-2006 GMC Sierra 1500 non-HD Console Enclosure

Xtreme Enclosures

$268.65
Fits: 2003-2006 Chevrolet Silverado 1/2 Ton (1500 series) Crew, Standard and Extended Cabs 2003-2006 GMC Sierra 1/2 Ton (1500 series) Crew, Standard and Extended Cabs Might fit the HD series 2500 and 3500 if the seat style is the same.  Email or...
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Dual Sub Box 1999-2006 GM SIERRA EXTENDED CAB

Dual Sub Box 1999-2006 GM SIERRA EXTENDED CAB

Xtreme Enclosures

$199.95 $201.15 $139.95
FITS 1999-2006 CHEVROLET SILVERADO / GMC SIERRA EXTENDED CAB DUAL SUBWOOFER ENCLOSURE Note: This will also fit 2007 Old Classic Body Style. If you have the 2007 Extended Cab, please check to see if you have the new or old body style. If unsure, please...
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On Sale!
Four 8 inch Sub Box 1999-2006 GM SIERRA EXTENDED CAB

Four 8 inch Sub Box 1999-2006 GM SIERRA EXTENDED CAB

Xtreme Enclosures

$260.00 $297.00 $200.00
FITS 1999-2006 CHEVROLET AND GMC SIERRA EXTENDED CAB TRUCKS THIS DOES NOT FIT THE HD CREW CABS Note: This also fits the 2007 Class (Old) Body Style Extended Cab; not new body.If you have a 2007 and you are not sure if you have the old or new style,...
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Pair of Single Sub Boxes 1999-2006 GM SIERRA EXTENDED CAB

Pair of Single Sub Boxes 1999-2006 GM SIERRA EXTENDED CAB

Xtreme Enclosures

$199.95 $201.15 $139.95
1999 TO 2006 CHEVY SILVERADO AND GMC SIERRA EXTENDED CAB TRUCK SUBWOOFER ENCLOSURE This does not fit the Crew Cab Heavy Duty models. Note: This will also fit 2007 Old Classic Body Style. If you have the 2007 Extended Cab, please check to see if you...
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PORTED DUAL SUB BOX 1999-2006 GM SIERRA EXTENDED CAB

PORTED DUAL SUB BOX 1999-2006 GM SIERRA EXTENDED CAB

Xtreme Enclosures

$249.95 $297.00 $225.00
1999-2006 Gmc Sierra Extended Cab 1999-2006 Chevrolet Silverado Extended Cab Note: This will also fit 2007 Old Classic Body Style. If you have the 2007 Extended Cab, please check to see if you have the new or old body style. If unsure, please...
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On Sale!
Single Sub Box 1999-2006 GM SIERRA EXTENDED CAB
Single Sub Box 1999-2006 GM SIERRA EXTENDED CAB
Single Sub Box 1999-2006 GM SIERRA EXTENDED CAB

Single Sub Box 1999-2006 GM SIERRA EXTENDED CAB

Xtreme Enclosures

$125.00 $160.65 $115.95
Note: This will also fit 2007 Old Classic Body Style. If you have the 2007 Extended Cab, please check to see if you have the new or old body style. If unsure, please contact us. Features: Fits 8, 10, or 12 inch subwoofers Fits under the rear seat...
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SINGLE SUB BOX 2007-2013 GM SIERRA EXTENDED CAB
SINGLE SUB BOX 2007-2013 GM SIERRA EXTENDED CAB
SINGLE SUB BOX 2007-2013 GM SIERRA EXTENDED CAB

SINGLE SUB BOX 2007-2013 GM SIERRA EXTENDED CAB

Xtreme Enclosures

$160.65
Fits 2007-2013 Chevy Silverado Extended Cab and GMC Sierra Extended Cab trucks Fits single 8 inch, 10 inch, and 12 inch subwoofer Subwoofer fires down 5/8 inch MDF wood Air space = .6 cubic ft per sub Mounting depth for 8 inch sub = 6 inches Mounting...
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