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Collection:

2001-2004 GM 2500/3500

304 products
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Regular price $1,099.00
Sale price $1,099.00
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Fleece Performance 01-04 GM Duramax LB7 Freedom Cylinder Head w/Cupless Injector Bore (Driver Side)
Regular price $99.75
Sale price $99.75
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Increase your LB7's potential with this simple, but effective upgrade. Back-to-back dyno pulls showed an increase of 15hp with this Fleece Performance Modified LB7 Intake Horn ? that?s about the ch...
Regular price $1,999.00
Sale price $1,999.00
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Wake up your 2001-2004 LB7 with the drop in replacement Fleece Performance LB7 Cheetah Turbocharger. Featuring a Fleece Performance custom 63mm compressor wheel and high flow Inconel turbine wheel,...
Regular price $399.00
Sale price $399.00
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The Fleece Performance TapShifter allows you to shift your 2001-2005 GM Allison Transmission with the touch of a button just like the 2006 and newer trucks. Perfect for towing, drag racing, daily d...
Regular price $19.99
Sale price $19.99
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Fleece Performance (2) Setrab to -10AN Fittings Purchased w/ Allison Transmission Cooler Lines
Regular price $37.95
Sale price $37.95
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Fleece 01-10 GM 2500-3500 Fuel Primer Bulb Sealing Kit