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Collection: Fleece Performance.

355 products
  • Fleece Performance 11-16 GM 2500/3500 Duramax LML CP3 Conversion Kit w/HD CP3
    Regular price
    $2,599.00
    Sale price
    $2,599.00
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  • Fleece Performance GM Silverado/Sierra 2500/3500 6.6L LLY Duramax Vane Position Sensor Pigtail
    Regular price
    $28.99
    Sale price
    $28.99
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  • Fleece Performance 19-22 RAM 2500/3500 Cummins 6.7L Replacement Thermostat Housing w/Aux Port
    Regular price
    $129.99
    Sale price
    $129.99
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  • Fleece Performance 07.5-18 Dodge/RAM 2500/3500 Cummins Replacement Coolant Bypass Hose
    Regular price
    $89.99
    Sale price
    $89.99
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  • Fleece Performance 98.5-07 Dodge 2500/3500 Cummins Replacement Thermostat Housing w/Aux Port
    Regular price
    $129.99
    Sale price
    $129.99
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  • Fleece Performance 13-18 RAM 2500/3500 6.7L Cummins Coolant Bypass Kit
    Regular price
    $379.99
    Sale price
    $379.99
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  • Fleece Performance 07.5-12 Dodge/RAM 2500/3500 6.7L Cummins Coolant Bypass Kit
    Regular price
    $399.99
    Sale price
    $399.99
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  • Fleece Performance 04.5-10 Chevy Duramax (LLY/LBZ/LMM) 63mm STREET VNT Cheetah Turbo w/ HX40 Outlet
    Regular price
    $2,599.00
    Sale price
    $2,599.00
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  • Fleece Performance Universal Molded Plastic 5in Intake Manifold Elbow w/ Sensor Mounting Provisions
    Regular price
    $84.99
    Sale price
    $84.99
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  • Fleece Performance Universal Molded Rubber Elbow for 5in Intakes
    Regular price
    $84.99
    Sale price
    $84.99
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  • Fleece Performance Universal Molded Plastic 5in Intake Manifold Elbow
    Regular price
    $93.99
    Sale price
    $93.99
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  • Fleece Performance 01-13 GM Duramax 6.6L Duramax Turbo Thermostat Delete Plug
    Regular price
    $37.95
    Sale price
    $37.95
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  • Fleece Performance 11-16 LML Duramax 6.6L S300/S400 Turbo Installation Kit
    Regular price
    $285.66
    Sale price
    $285.66
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  • Fleece Performance 01-13 GM Duramax 6.6L Duramax S300/S400 Turbo Installation Kit
    Regular price
    $279.00
    Sale price
    $279.00
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  • Fleece Performance 07.5-12 Dodge 6.7L Cummins S300-S400 Turbo Installation Kit
    Regular price
    $209.00
    Sale price
    $209.00
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  • Fleece Performance 89-07 Dodge 5.9L Cummins S300-S400 Turbo Installation Kit
    Regular price
    $180.00
    Sale price
    $180.00
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  • Fleece Performance 01-10 GM Duramax 6.6L LB7 / LLY / LBZ / LMM Front TufShafts
    Regular price
    $945.00
    Sale price
    $945.00
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  • Fleece Performance (2) Setrab to -10AN Fittings Purchased w/ Allison Transmission Cooler Lines
    Regular price
    $19.99
    Sale price
    $19.99
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  • Fleece Performance 15-16 GM Duramax 2500/3500 Heavy Duty Transmission Cooler lines
    Regular price
    $329.99
    Sale price
    $329.99
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  • Fleece Performance 11-14 GM Duramax 2500/3500 Heavy Duty Trans Cooler Lines
    Regular price
    $329.99
    Sale price
    $329.99
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  • Fleece Performance 06-10 GM Duramax 6.6L LBZ/LMM Allison Transmission Cooler Lines
    Regular price
    $269.00
    Sale price
    $269.00
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  • Fleece Performance 01-05 GM Duramax 6.6L LB7/LLY Allison Transmission Cooler Lines
    Regular price
    $269.00
    Sale price
    $269.00
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  • Fleece Performance 17-19 GM Duramax 2500/3500 Heavy Duty Transmission Cooler lines
    Regular price
    $329.99
    Sale price
    $329.99
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  • Fleece Performance 10-12 Cummins w/ 68RE Replacement Transmission Line Kit
    Regular price
    $268.32
    Sale price
    $268.32
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  • Fleece Performance 11+ GM Duramax 6.6L 2500-3500HD Pickups Tie Rod Sleeves
    Regular price
    $81.90
    Sale price
    $81.90
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  • Fleece Performance 2015+ Chevrolet Colorado/Canyon Tie Rod Sleeves
    Regular price
    $75.99
    Sale price
    $75.99
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  • Fleece Performance 01-11 GM Duramax 6.6L 2500-3500HD Pickups Tie Rod Reinforcement Sleeves
    Regular price
    $79.99
    Sale price
    $79.99
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  • Fleece Performance 03-05 GM Duramax 6.6L LB7 / LLY GM/Allison TapShifter
    Regular price
    $349.99
    Sale price
    $349.99
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  • Fleece Performance 01-02 GM Duramax 6.6L LB7 Allison TapShifter
    Regular price
    $349.99
    Sale price
    $349.99
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  • Fleece Performance 01-05 Kodiak/TopKick 5 Speed Allison TapShifter
    Regular price
    $349.99
    Sale price
    $349.99
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  • Fleece Performance 01-13 GM Duramax 6.6L 1.5in T4 Pedestal Spacer
    Regular price
    $119.74
    Sale price
    $119.74
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  • Fleece Performance Stack Cover - 8 inch - Straigh Cut
    Regular price
    $47.99
    Sale price
    $47.99
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  • Fleece Performance Stack Cover - 8 inch - 45 Degree Miter
    Regular price
    $47.99
    Sale price
    $47.99
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  • Fleece Performance Stack Cover - 7 inch - Straigh Cut
    Regular price
    $45.99
    Sale price
    $45.99
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  • Fleece Performance Stack Cover - 7 inch - 45 Degree Miter
    Regular price
    $45.99
    Sale price
    $45.99
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  • Fleece Performance Stack Cover - 6 inch - Straigh Cut
    Regular price
    $44.99
    Sale price
    $44.99
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  • Fleece Performance Stack Cover - 6 inch - 45 Degree Miter
    Regular price
    $44.99
    Sale price
    $44.99
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  • Fleece Performance Stack Cover - 5 inch - Straigh Cut
    Regular price
    $43.99
    Sale price
    $43.99
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  • Fleece Performance Stack Cover - 5 inch - 45 Degree Miter
    Regular price
    $43.99
    Sale price
    $43.99
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  • Fleece Performance Universal 9/16in-18 Hex Socket Plug w/ O-Ring
    Regular price
    $4.49
    Sale price
    $4.49
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