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Product availability may vary, and some items may be on backorder from the manufacturer. You can contact us via the Contact Page or email us at info@holyhorsepower.co.
Product availability may vary, and some items may be on backorder from the manufacturer. You can contact us via the Contact Page or email us at info@holyhorsepower.co.

STILLEN

Steve Millen Racing

STILLEN® founder Steve Millen has been racing across the globe as a professional driver for over 30 years. From Formula Fords in Singapore, Rally Cars in Africa, Trucks in football stadiums, to Nissan Prototypes at Le Mans and the 24 Hours of Daytona; these are just some of Steve's victory credits. Steve captured the prestigious IMSA GT Driver's Championship in both 1992 and 1994 driving his Cunningham Racing prepared Nissan 300ZX Twin Turbo racecar. His lengthy list of wins has made him "The All Time Winningest Driver in IMSA GT History" a title that may remain intact for decades to come.

STILLEN - Who We Are

Steve Millen’s racing experience has influenced every aspect of STILLEN’s business. A fundamental part of success in racing rests in the ability to continually refine performance by a program of modification and testing; throughout the years, this has been Steve Millen's forte. Steve has been sought after for testing by such enthusiast magazines as Road & Track where you will often see his name or byline when they are testing the most powerful and exotic sports cars in the world. STILLEN builds and sell parts that are tested and proven to work following a regiment of testing and refinement;  Professional product evaluation in real-world driving situations gives STILLEN a distinct advantage. Car & Driver, Road & Track, Motor Trend, Automobile, AutoWeek, /Drive, DSport, The Smoking Tire, and Super Street have all reviewed and tested STILLEN products and project vehicles, and provided rave reviews

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  • STILLEN Bumper Cover Spoiler - Generation 7 KA2511S
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    Chevy / GMC Truck Bumper Cover Spoiler - Generation 7 SKU# KA2511S

    STILLEN
    $486.75
    $486.75 - $486.75
    $486.75
    $381.30
    $381.30 - $381.30
    $381.30
    In stock

    Generation 7; SS Style; Chevy / GMC Truck Bumper Cover Spoiler - Generation 7; STILLEN; STIBMPCVR01; Exterior; Bumpers; STI; Exterior/Body Styling/...

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    $486.75
    $486.75 - $486.75
    $486.75
    $381.30
    $381.30 - $381.30
    $381.30
    Save 22% Save %
  • STILLEN Bumper Cover / Valance KA2820
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    2014 Chevy Silverado Bumper Cover / Valance SKU# KA2820

    STILLEN
    $476.38
    $476.38 - $476.38
    $476.38
    $381.10
    $381.10 - $381.10
    $381.10
    In stock

    Front Bumper Cover / Valance; Polyurethane Construction - Ready for Prep and Paint; Developed and Manufactured In-House; Vehicle Specific Applicati...

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    $476.38
    $476.38 - $476.38
    $476.38
    $381.10
    $381.10 - $381.10
    $381.10
    Save 20% Save %
  • Standard Performance Lightweight Crank Pulley for Nissan 350Z / Infiniti FX35, G35
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    Nissan 350Z [Z33] / Infiniti FX35, G35 Standard Performance Lightweight Crank Pulley SKU# '400346

    STILLEN
    $464.32
    $464.32 - $464.32
    $464.32
    $379.30
    $379.30 - $379.30
    $379.30
    In stock

    Standard Performance Lightweight Crank Pulley for Nissan 350Z / Infiniti FX35, G35

    $464.32
    $464.32 - $464.32
    $464.32
    $379.30
    $379.30 - $379.30
    $379.30
    Save 18% Save %
  • 2005-2006 Ford GT Rear Diffuser | STILLEN FGT102000
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    2005-2006 Ford GT Rear Diffuser - Long Version - FGT102000

    STILLEN
    $421.23
    $421.23 - $421.23
    $421.23
    $378.21
    $378.21 - $378.21
    $378.21
    In stock

    2005-2006 Ford GT Rear Diffuser - Long Version - FGT102000   4" Longer than OEM - Increases Downforce at Speed Developed and Perfected on the Race...

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    $421.23
    $421.23 - $421.23
    $421.23
    $378.21
    $378.21 - $378.21
    $378.21
    Save 10% Save %
  • 2005-2006 Ford GT Rear Diffuser - FGT102000S

    2005-2006 Ford GT Rear Diffuser - FGT102000S

    STILLEN
    $323.37 - $323.37
    $323.37
    $378.21
    $378.21 - $378.21
    $378.21
    In stock

    2005-2006 Ford GT Rear Diffuser- OEM LENGTH - FGT102000S   These replacement rear diffuser panels are designed to remove the factory fiberglass fin...

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    $323.37 - $323.37
    $323.37
    $378.21
    $378.21 - $378.21
    $378.21
  • 2013-2014 Ford Mustang - Front Splitter w/ Turnbuckles - KB417214
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    2013-2014 Ford Mustang - Front Splitter w/ Turnbuckles - KB417214

    STILLEN
    $392.61
    $392.61 - $392.61
    $392.61
    $373.60
    $373.60 - $373.60
    $373.60
    In stock

    Product Features Splitter For Use With OEM Factory Fascia Polyurethane Construction w/ Stainless Steel Turnbuckles Increase Downforce and Improve ...

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    $392.61
    $392.61 - $392.61
    $392.61
    $373.60
    $373.60 - $373.60
    $373.60
    Save 5% Save %
  • Save 5% Save %

    2013-2015 Honda Accord Coupe Front Splitter - Unpainted - KB25001

    STILLEN
    $386.15
    $386.15 - $386.15
    $386.15
    $367.45
    $367.45 - $367.45
    $367.45
    In stock

    Product Features Fits Copue Only! Unpainted - Ready to Prime and Paint Polyurethane Construction Front Splitter (Lip Spoiler) Adds Downforce...

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    $386.15
    $386.15 - $386.15
    $386.15
    $367.45
    $367.45 - $367.45
    $367.45
    Save 5% Save %
  • 2017-2021 Infiniti Q60 3.0t Rear Diffuser [Matte Black] - KB11235MB
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    2017-2022 Infiniti Q60 3.0t Rear Diffuser [Matte Black] - KB11235MB

    STILLEN
    $380.52
    $380.52 - $380.52
    $380.52
    $362.11
    $362.11 - $362.11
    $362.11
    In stock

    Product Features Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses) No Cutting or Modification to Bumper - Removable Painted Matt...

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    $380.52
    $380.52 - $380.52
    $380.52
    $362.11
    $362.11 - $362.11
    $362.11
    Save 5% Save %
  • Underdrive Performance Lightweight Pulley Set for Nissan 350Z / Infiniti FX35, G35
    Save 9% Save %

    Nissan 350Z [Z33] / Infiniti FX35, G35 Underdrive Performance Lightweight Pulley Set SKU# '400336

    STILLEN
    $394.59
    $394.59 - $394.59
    $394.59
    $360.25
    $360.25 - $360.25
    $360.25
    In stock

    Underdrive Performance Lightweight Pulley Set for Nissan 350Z / Infiniti FX35, G35

    $394.59
    $394.59 - $394.59
    $394.59
    $360.25
    $360.25 - $360.25
    $360.25
    Save 9% Save %
  • STILLEN Sway Bars Hyundai Genesis Coupe
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    2010-2016 Hyundai Genesis Coupe Adjustable Sway Bar Kit - 304390

    STILLEN
    $387.49
    $387.49 - $387.49
    $387.49
    $356.83
    $356.83 - $356.83
    $356.83
    In stock

    Product Features Front & Rear Sway Bar Kit Reduces Body Roll & Improves Cornering 5-Way Adjustable Front Bar (29mm) 3-Way Adjustable Rear...

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    $387.49
    $387.49 - $387.49
    $387.49
    $356.83
    $356.83 - $356.83
    $356.83
    Save 8% Save %
  • STILLEN Bumper Cover Spoiler - Generation 1 KA4811SD
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    2008-2010 Ford F250, F350 Super Duty Bumper Cover Spoiler - Generation 1 SKU# KA4811SD

    STILLEN
    $444.19
    $444.19 - $444.19
    $444.19
    $355.35
    $355.35 - $355.35
    $355.35
    In stock

    Generation 1 Bumper Cover Spoiler; Polyurethane Construction - Ready for Prep and Paint; Developed and Manufactured In-House; Vehicle Specific Appl...

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    $444.19
    $444.19 - $444.19
    $444.19
    $355.35
    $355.35 - $355.35
    $355.35
    Save 20% Save %
  • 2017-2021 Infiniti Q60 3.0t Front Splitter - KB11230
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    2017-2022 Infiniti Q60 3.0t Front Splitter - KB11230

    STILLEN
    $368.67
    $368.67 - $368.67
    $368.67
    $350.82
    $350.82 - $350.82
    $350.82
    In stock

    Product Features Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses) No Cutting or Modification to Bumper - Removable Painted...

    View full details
    $368.67
    $368.67 - $368.67
    $368.67
    $350.82
    $350.82 - $350.82
    $350.82
    Save 5% Save %
  • Save 14% Save %

    2003-2009 Nissan 350Z [Z33] / 2003-2008 Infiniti G35 Transmission Cooler Kit - 400639

    STILLEN
    $408.99
    $408.99 - $408.99
    $408.99
    $350.27
    $350.27 - $350.27
    $350.27
    In stock

    Product Features Bolt-On Installation - Instructions Supplied Includes Cooler & Bracket Assembly, Hose Kit and Hardware. Includes Cooler &...

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    $408.99
    $408.99 - $408.99
    $408.99
    $350.27
    $350.27 - $350.27
    $350.27
    Save 14% Save %
  • Save 5% Save %

    2008-2010 Infiniti G37 Coupe Front Lip Spoiler - KB11922

    STILLEN
    $366.91
    $366.91 - $366.91
    $366.91
    $349.15
    $349.15 - $349.15
    $349.15
    In stock

    Product Features Front Lip Spoiler - Sport Models (Except AWD) Polyurethane Construction - Ready for Prep and Paint Developed and Manufactur...

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    $366.91
    $366.91 - $366.91
    $366.91
    $349.15
    $349.15 - $349.15
    $349.15
    Save 5% Save %
  • 2015-2018 Subaru WRX STILLEN Hi-Flow Air Intake Kit [VA1] - 402000
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    2015-2018 Subaru WRX Hi-Flow Air Intake Kit [VA1] - 402000

    STILLEN
    $368.72
    $368.72 - $368.72
    $368.72
    $339.55
    $339.55 - $339.55
    $339.55
    In stock

    Product Features Not for sale for vehicles in California 30 WHP Gain & Increased Throttle Performance* Aluminum Mandrel Bent Intake Tubes Alum...

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    $368.72
    $368.72 - $368.72
    $368.72
    $339.55
    $339.55 - $339.55
    $339.55
    Save 8% Save %
  • 2008-2010 Infiniti G37 Front Splitter [OEM Sport Fascia] - 1036040SP
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    2008-2010 Infiniti G37 Front Splitter [OEM Sport Fascia] - 1036040SP

    STILLEN
    $356.20
    $356.20 - $356.20
    $356.20
    $338.96
    $338.96 - $338.96
    $338.96
    In stock

    Product Features Splitter For Use with OEM Factory Fascia Sport Models Only Polyurethane Construction w/Stainless Steel Turnbuckles Increase Downf...

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    $356.20
    $356.20 - $356.20
    $356.20
    $338.96
    $338.96 - $338.96
    $338.96
    Save 5% Save %
  • 2003-2007 Infiniti G35 Air Intake - (Hi Flow w/ Z-Tube) - 402834
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    2003-2007 Infiniti G35 Air Intake - (Hi Flow w/ Z-Tube) - 402834

    STILLEN
    $366.57
    $366.57 - $366.57
    $366.57
    $337.57
    $337.57 - $337.57
    $337.57
    In stock

    Product Features Z-Tube Constructed of Roto-Molded Plastic Connections For All Factory Breather Tubes Increased Throttle Response, Adds 11HP Sedan...

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    $366.57
    $366.57 - $366.57
    $366.57
    $337.57
    $337.57 - $337.57
    $337.57
    Save 8% Save %
  • 2004-2015 Nissan Titan, Nissan Armada , Infiniti QX56 STILLEN Hi-Flow Intake - Enclosed Air Box - Oil Filter - 403447
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    2004-2015 Nissan Titan, Nissan Armada , Infiniti QX56 Hi-Flow Intake - Enclosed Air Box - Oil Filter - 403447

    STILLEN
    $362.59
    $362.59 - $362.59
    $362.59
    $333.90
    $333.90 - $333.90
    $333.90
    In stock

    Product Features 50 State Emissions Compliant! CARB Exempt - EO# D-436-22 Designed & Manufactured in U.S.A. In-House At STILLEN Molded Airboxe...

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    $362.59
    $362.59 - $362.59
    $362.59
    $333.90
    $333.90 - $333.90
    $333.90
    Save 8% Save %
  • STILLEN Fender Flare Kit FF2500
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    Chevy / GMC C1500, Suburban, K1500, Tahoe, Yukon - Fender Flare Kit - FF2500

    STILLEN
    $388.49
    $388.49 - $388.49
    $388.49
    $330.21
    $330.21 - $330.21
    $330.21
    In stock

    Product Features Front and Rear Kit - Round Style Polyurethane Construction - Ready for Prep and Paint Developed and Manufactured In-House Vehicl...

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    $388.49
    $388.49 - $388.49
    $388.49
    $330.21
    $330.21 - $330.21
    $330.21
    Save 15% Save %
  • STILLEN Oil Cooler Kit 400400
    Save 20% Save %

    1990-1996 Nissan 300ZX Oil Cooler Kit SKU# '400400

    STILLEN
    $404.60
    $404.60 - $404.60
    $404.60
    $323.68
    $323.68 - $323.68
    $323.68
    In stock

    STILLEN Oil Cooler Kit 400400

    $404.60
    $404.60 - $404.60
    $404.60
    $323.68
    $323.68 - $323.68
    $323.68
    Save 20% Save %
  • STILLEN Y-Pipe Infiniti G35
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    2003-2009 Nissan 350Z / 2003-2007 Infiniti G35 Coupe Y-Pipe Exhaust Pipe - 504252

    STILLEN
    $350.22
    $350.22 - $350.22
    $350.22
    $322.52
    $322.52 - $322.52
    $322.52
    In stock

    Product Features Mandrel Bent Stainless Steel Y-Pipe Constructed of 2.5" Piping Up to 3" at the Collector For STILLEN Single Path, Stock or Nismo ...

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    $350.22
    $350.22 - $350.22
    $350.22
    $322.52
    $322.52 - $322.52
    $322.52
    Save 8% Save %
  • 2003-2008 Infiniti FX35 STILLEN Cold Air Intake [w/Z-TUBE KIT] - 402834FX
    Save 10% Save %

    2003-2008 Infiniti FX35 STILLEN Cold Air Intake [w/Z-TUBE KIT] - 402834FX

    STILLEN
    $355.00
    $355.00 - $355.00
    $355.00
    $318.09
    $318.09 - $318.09
    $318.09
    In stock

    Product Features Z-Tube Constructed of Roto-Molded Plastic Connections For All Factory Breather Tubes Increased Throttle Response, Adds 11HP Sedan...

    View full details
    $355.00
    $355.00 - $355.00
    $355.00
    $318.09
    $318.09 - $318.09
    $318.09
    Save 10% Save %
  • 2009-2012 Nissan GT-R STILLEN Mud Flap Kit [Front & Rear] - GTRKB128214
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    2009-2012 Nissan GT-R Mud Flap Kit [Front & Rear] - GTRKB128214

    STILLEN
    $328.13
    $328.13 - $328.13
    $328.13
    $312.25
    $312.25 - $312.25
    $312.25
    In stock

    2009-2012 Nissan GT-R Mud Flap Kit [Front & Rear] - GTRKB128214 4-Piece Mud Flap Kit - Front and Rear Solid Polyurethane Construction Matte Bl...

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    $328.13
    $328.13 - $328.13
    $328.13
    $312.25
    $312.25 - $312.25
    $312.25
    Save 5% Save %
  • Nissan 370Z [Z34] / Infiniti G37, G35, Q40, Q60 Sedan Adjustable Front Sway Bar - 304366
    Save 8% Save %

    Nissan 370Z [Z34] / Infiniti G37, G35, Q40, Q60 Sedan Adjustable Front Sway Bar - 304366

    STILLEN
    $336.37
    $336.37 - $336.37
    $336.37
    $309.76
    $309.76 - $309.76
    $309.76
    In stock

    Product Features Front Sway Bar Kit Reduces Body Roll & Improves Cornering 5-Way Adjustable Front Bar (21-48% Stiffer) Constructed From High ...

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    $336.37
    $336.37 - $336.37
    $336.37
    $309.76
    $309.76 - $309.76
    $309.76
    Save 8% Save %

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