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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 Penske 8700 Series Racing Shock Absorbers - Front Kit PS-87GT40-F.1

    2005-2006 Ford GT Penske 8700 Series Racing Shock Absorbers - Front Kit SKU# PS-87GT40-F.1

    STILLEN
    $3,136.35 - $3,136.35
    $3,136.35
    $3,136.35
    $3,136.35 - $3,136.35
    $3,136.35
    In stock

    Triple Adjustable - Front Kit (Pair); High Speed Compression Adjustment - 12 Clicks; Low Speed Compression Adjustment - 30 Clicks Rebound Adjustmen...

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    $3,136.35 - $3,136.35
    $3,136.35
    $3,136.35
    $3,136.35 - $3,136.35
    $3,136.35
  • STILLEN Penske 8700 Series Racing Shock Absorbers - Rear Kit PS-87GT40-R.1

    2005-2006 Ford GT Penske 8700 Series Racing Shock Absorbers - Rear Kit SKU# PS-87GT40-R.1

    STILLEN
    $3,136.35 - $3,136.35
    $3,136.35
    $3,136.35
    $3,136.35 - $3,136.35
    $3,136.35
    In stock

    Triple Adjustable - Rear Kit (Pair); High Speed Compression Adjustment - 12 Clicks; Low Speed Compression Adjustment - 30 Clicks Rebound Adjustment...

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    $3,136.35 - $3,136.35
    $3,136.35
    $3,136.35
    $3,136.35 - $3,136.35
    $3,136.35
  • STILLEN Penske 8300 Series Racing Shock Absorbers - Rear Kit w/Billet Reservoir

    2005-2006 Ford GT Penske 8300 Series Racing Shock Absorbers - Rear Kit w/Billet Reservoir Brackets SKU# PS-83GT40-R.2

    STILLEN
    $2,811.90 - $2,811.90
    $2,811.90
    $2,811.90
    $2,811.90 - $2,811.90
    $2,811.90
    In stock

    Double Adjustable - Rear Kit (Pair) Includes Two (2) Billet Shock Reservoir Brackets; Rebound Adjustment - 30 Clicks; Linear Compression Adjustment...

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    $2,811.90 - $2,811.90
    $2,811.90
    $2,811.90
    $2,811.90 - $2,811.90
    $2,811.90
  • STILLEN Cat Back Exhaust for 2009-2018 Nissan GT-R [R35]
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    STILLEN 2009-2018 Nissan GT-R 304 Stainless Steel Cat-Back System SKU# GTR504380

    STILLEN
    $3,124.09
    $3,124.09 - $3,124.09
    $3,124.09
    $2,655.48
    $2,655.48 - $2,655.48
    $2,655.48
    In stock

    304 Stainless Cat-Back System; 5" Tips - Fully Polished Rear Section; Tested and Tuned For Superior Performance; Limited Lifetime Warranty; 304 Sta...

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    $3,124.09
    $3,124.09 - $3,124.09
    $3,124.09
    $2,655.48
    $2,655.48 - $2,655.48
    $2,655.48
    Save 15% Save %
  • STILLEN Penske 8300 Series Racing Shock Absorbers - Front Kit PS-83GT40-F.1

    2005-2006 Ford GT Penske 8300 Series Racing Shock Absorbers - Front Kit SKU# PS-83GT40-F.1

    STILLEN
    $2,541.53 - $2,541.53
    $2,541.53
    $2,541.53
    $2,541.53 - $2,541.53
    $2,541.53
    In stock

    Double Adjustable - Front Kit (Pair); Rebound Adjustment - 30 Clicks; Linear Compression Adjustment - 16 Clicks; Accepts Readily Available Coil Spr...

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    $2,541.53 - $2,541.53
    $2,541.53
    $2,541.53
    $2,541.53 - $2,541.53
    $2,541.53
  • STILLEN Penske 8300 Series Racing Shock Absorbers - Rear Kit PS-83GT40-R.1

    2005-2006 Ford GT Penske 8300 Series Racing Shock Absorbers - Rear Kit SKU# PS-83GT40-R.1

    STILLEN
    $2,541.53 - $2,541.53
    $2,541.53
    $2,541.53
    $2,541.53 - $2,541.53
    $2,541.53
    In stock

    Double Adjustable - Rear Kit (Pair); Rebound Adjustment - 30 Clicks; Linear Compression Adjustment - 16 Clicks; Accepts Readily Available Coil Spri...

    View full details
    $2,541.53 - $2,541.53
    $2,541.53
    $2,541.53
    $2,541.53 - $2,541.53
    $2,541.53
  • STILLEN Cat-Back Exhaust System - Angled Tips - No Muffler FGT501000A
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    STILLEN 2005-2006 Ford GT Cat-Back Exhaust System - Angled Tips - No Muffler SKU# FGT501000A

    STILLEN
    $2,082.64
    $2,082.64 - $2,082.64
    $2,082.64
    $2,006.59
    $2,006.59 - $2,006.59
    $2,006.59
    In stock

    3" 409 Stainless Steel Tubing with Polished Ceramic Finish Angle Cut Tips; Milled Aluminum Brackets with Stainless Steel "Leaf Spring"; "X" Pipe Eq...

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    $2,082.64
    $2,082.64 - $2,082.64
    $2,082.64
    $2,006.59
    $2,006.59 - $2,006.59
    $2,006.59
    Save 4% Save %
  • 2017-2021 Infiniti Q60 3.0t Cat-Back Exhaust System [Carbon Tips] - 504454
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    2017-2021 Infiniti Q60 3.0t Cat-Back Exhaust System [Carbon Tips] - 504454

    STILLEN
    $1,843.64
    $1,843.64 - $1,843.64
    $1,843.64
    $1,697.78
    $1,697.78 - $1,697.78
    $1,697.78
    In stock

    Product Features 304 Stainless Steel Construction Carbon Fiber Tips Greatest Incremental Horsepower gain: 26.3 HP @ 4,680 RPM* Greatest Increment...

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    $1,843.64
    $1,843.64 - $1,843.64
    $1,843.64
    $1,697.78
    $1,697.78 - $1,697.78
    $1,697.78
    Save 8% Save %
  • Save 5% Save %

    2011-2014 Ford Mustang-Conv DF 2011-2014 Mustang 5.0L w/met-16399

    STILLEN
    $1,729.85
    $1,729.85 - $1,729.85
    $1,729.85
    $1,637.00
    $1,637.00 - $1,637.00
    $1,637.00
    In stock

    Keep the check engine light off with MagnaFlow Direct-Fit Catalytic Converter 16399. With features including free-flowing mandrel-bent tubing and h...

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    $1,729.85
    $1,729.85 - $1,729.85
    $1,729.85
    $1,637.00
    $1,637.00 - $1,637.00
    $1,637.00
    Save 5% Save %
  • 2017-2021 Infiniti Q60 3.0t Cat-Back Exhaust System [Burnt Tips] - 504455
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    2017-2021 Infiniti Q60 3.0t Cat-Back Exhaust System [Burnt Tips] - 504455

    STILLEN
    $1,720.73
    $1,720.73 - $1,720.73
    $1,720.73
    $1,584.59
    $1,584.59 - $1,584.59
    $1,584.59
    In stock

    Product Features 304 Stainless Steel Construction Burnt Tips Greatest Incremental Horsepower gain: 26.3 HP @ 4,680 RPM* Greatest Incremental Torq...

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    $1,720.73
    $1,720.73 - $1,720.73
    $1,720.73
    $1,584.59
    $1,584.59 - $1,584.59
    $1,584.59
    Save 8% Save %
  • 2008-2013 Infiniti G37 Coupe / 2014-2015 Infiniti Q60 Stainless Cat-Back Exhaust System - 504402
    Save 6% Save %

    2008-2013 Infiniti G37 Coupe / 2014-2015 Infiniti Q60 Stainless Cat-Back Exhaust System - 504402

    STILLEN
    $1,680.64
    $1,680.64 - $1,680.64
    $1,680.64
    $1,579.65
    $1,579.65 - $1,579.65
    $1,579.65
    In stock

    Product Features 304 Stainless Steel Construction Polished 304SS Dual Wall Tips Mild at Idle/Cruising - Aggressive Note Under Throttle Limited Lif...

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    $1,680.64
    $1,680.64 - $1,680.64
    $1,680.64
    $1,579.65
    $1,579.65 - $1,579.65
    $1,579.65
    Save 6% Save %
  • 2003-2007 Infiniti G35 Coupe Stainless Steel Exhaust Systems - Dual Wall Tips - 504360D
    Save 11% Save %

    2003-2007 Infiniti G35 Coupe Stainless Steel Exhaust Systems - Dual Wall Tips - 504360D

    STILLEN
    $1,770.82
    $1,770.82 - $1,770.82
    $1,770.82
    $1,579.65
    $1,579.65 - $1,579.65
    $1,579.65
    In stock

    Product Features 304 Stainless Steel Construction Polished 304SS Dual Wall Tips Mild at Idle/Cruising - Aggressive Note Under Throttle Limited Lif...

    View full details
    $1,770.82
    $1,770.82 - $1,770.82
    $1,770.82
    $1,579.65
    $1,579.65 - $1,579.65
    $1,579.65
    Save 11% Save %
  • 2009-2020 Nissan 370Z STILLEN Cat Back Exhaust [Z34] - 504355
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    2009-2020 Nissan 370Z STILLEN Cat Back Exhaust [Z34] - 504355

    STILLEN
    $1,782.19
    $1,782.19 - $1,782.19
    $1,782.19
    $1,579.65
    $1,579.65 - $1,579.65
    $1,579.65
    In stock

    Product Features 304 Stainless Steel Construction - Long Service Life & Dependability Polished 4.5" Dual Wall Tips Aggressive Tone Without An...

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    $1,782.19
    $1,782.19 - $1,782.19
    $1,782.19
    $1,579.65
    $1,579.65 - $1,579.65
    $1,579.65
    Save 11% Save %
  • 2017-2021 Infiniti Q60 3.0t Cat Back Exhaust [Polished Tips] - 504453
    Save 8% Save %

    2017-2021 Infiniti Q60 3.0t Cat Back Exhaust [Polished Tips] - 504453

    STILLEN
    $1,659.27
    $1,659.27 - $1,659.27
    $1,659.27
    $1,528.00
    $1,528.00 - $1,528.00
    $1,528.00
    In stock

    Product Features 304 Stainless Steel Construction Polished Tips Greatest Incremental Horsepower gain: 26.3 HP @ 4,680 RPM* Greatest Incremental T...

    View full details
    $1,659.27
    $1,659.27 - $1,659.27
    $1,659.27
    $1,528.00
    $1,528.00 - $1,528.00
    $1,528.00
    Save 8% Save %
  • 2023 Nissan Z | STILLEN Cat Back Exhaust "Street Series" SKU 504503, 504504, 504505

    2023 Nissan Z | STILLEN Cat Back Exhaust "Street Series" SKU 504503, 504504, 504505

    STILLEN
    $1,099.91 - $1,099.91
    $1,099.91
    $1,511.29 - $1,699.00
    $1,511.29 - $1,699.00
    $1,511.29
    In stock

      STILLEN is excited to release the cat-back exhaust system for the 2023 Nissan Z.  During the development of this exhaust system STILLEN engineer...

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    $1,099.91 - $1,099.91
    $1,099.91
    $1,511.29 - $1,699.00
    $1,511.29 - $1,699.00
    $1,511.29
  • 2009-2013 Infiniti G37 Sedan, 2015 Q40 Stainless Steel Cat-Back Exhaust System - 504377
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    2009-2013 Infiniti G37 Sedan, 2015 Q40 Stainless Steel Cat-Back Exhaust System - 504377

    STILLEN
    $1,720.73
    $1,720.73 - $1,720.73
    $1,720.73
    $1,473.67
    $1,473.67 - $1,473.67
    $1,473.67
    In stock

    Product Features 304 Stainless Steel Construction Fits RWD & AWD Models Polished 304SS Dual Wall Tips Authoratative Tone Under Throttle   BEN...

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    $1,720.73
    $1,720.73 - $1,720.73
    $1,720.73
    $1,473.67
    $1,473.67 - $1,473.67
    $1,473.67
    Save 14% Save %
  • Save 15% Save %

    2003-2008 Infiniti FX35 / 2003-2005 Infiniti FX45 Stainless Steel Cat-Back Exhaust System - 504385

    STILLEN
    $1,714.46
    $1,714.46 - $1,714.46
    $1,714.46
    $1,457.29
    $1,457.29 - $1,457.29
    $1,457.29
    In stock

    Product Features 304 Stainless Steel Construction Polished 304SS Dual Wall Tips Increase of Horsepower and Torque Mild at Idle/Cruising - Aggressi...

    View full details
    $1,714.46
    $1,714.46 - $1,714.46
    $1,714.46
    $1,457.29
    $1,457.29 - $1,457.29
    $1,457.29
    Save 15% Save %
  • 2007-2008 Infiniti G35 Sedan - Stainless Steel Cat-Back Exhaust System - 504375
    Save 8% Save %

    2007-2008 Infiniti G35 Sedan - Stainless Steel Cat-Back Exhaust System - 504375

    STILLEN
    $1,547.46
    $1,547.46 - $1,547.46
    $1,547.46
    $1,425.03
    $1,425.03 - $1,425.03
    $1,425.03
    In stock

    Product Features Generation 2 Design - Great Power with a Quieter Tone Fits RWD & AWD Models Stainless Steel Construction - Dual Path Piping w...

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    $1,547.46
    $1,547.46 - $1,547.46
    $1,547.46
    $1,425.03
    $1,425.03 - $1,425.03
    $1,425.03
    Save 8% Save %
  • STILLEN Body Kit Infiniti G37
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    2008-2013 Infiniti G37 Coupe 4-Piece Body Kit - KB11920KT

    STILLEN
    $1,432.38
    $1,432.38 - $1,432.38
    $1,432.38
    $1,363.02
    $1,363.02 - $1,363.02
    $1,363.02
    In stock

    The STILLEN Infinity G37 Kit comes with a STILLEN front lip spoiler, side skirt and rear valance that is made of polyurethane construction. This s...

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    $1,432.38
    $1,432.38 - $1,432.38
    $1,432.38
    $1,363.02
    $1,363.02 - $1,363.02
    $1,363.02
    Save 5% Save %
  • 2003-2009 Nissan 350Z [Z33] Stainless Steel Exhaust Systems - 504350D
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    2003-2009 Nissan 350Z [Z33] Stainless Steel Exhaust Systems - 504350D

    STILLEN
    $1,568.31
    $1,568.31 - $1,568.31
    $1,568.31
    $1,343.14
    $1,343.14 - $1,343.14
    $1,343.14
    In stock

    Product Features 304 Stainless Steel Construction Polished 304SS Dual Wall Tips Mild at Idle/Cruising - Aggressive Note Under Throttle Limited Li...

    View full details
    $1,568.31
    $1,568.31 - $1,568.31
    $1,568.31
    $1,343.14
    $1,343.14 - $1,343.14
    $1,343.14
    Save 14% Save %
  • STILLEN 5-Piece Polyurethane Body Kit - With Rear Wing KB41500W
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    2010-2013 Ford Mustang 5-Piece Polyurethane Body Kit - With Rear Wing SKU# KB41500W

    STILLEN
    $1,632.31
    $1,632.31 - $1,632.31
    $1,632.31
    $1,305.85
    $1,305.85 - $1,305.85
    $1,305.85
    In stock

    Kit Includes STILLEN Rear Valance (KB410210) STILLEN Rear Wing (KB41023) STILLEN Side Skirts (KB41025) STILLEN Front Lip (KB41522); Polyurethane Co...

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    $1,632.31
    $1,632.31 - $1,632.31
    $1,632.31
    $1,305.85
    $1,305.85 - $1,305.85
    $1,305.85
    Save 20% Save %
  • 2003-2006 Infiniti G35 Sedan [Gen 2] STILLEN Stainless Steel Cat-Back Exhaust System - 504370
    Save 8% Save %

    2003-2006 Infiniti G35 Sedan [Gen 2] Stainless Steel Cat-Back Exhaust System - 504370

    STILLEN
    $1,389.19
    $1,389.19 - $1,389.19
    $1,389.19
    $1,279.28
    $1,279.28 - $1,279.28
    $1,279.28
    In stock

    Product Features Generation 2 Design - Great Power with a Quieter Tone Fits RWD & AWD Models Stainless Steel Construction - Dual Path Piping ...

    View full details
    $1,389.19
    $1,389.19 - $1,389.19
    $1,389.19
    $1,279.28
    $1,279.28 - $1,279.28
    $1,279.28
    Save 8% Save %
  • Save 8% Save %

    2011-2013 Infiniti M56 / 2014-2018 Q70 Stainless Steel Near Cat-Back Exhaust System - 504456

    STILLEN
    $1,328.49
    $1,328.49 - $1,328.49
    $1,328.49
    $1,223.39
    $1,223.39 - $1,223.39
    $1,223.39
    In stock

    Product Features Near Cat-Back Exhaust System 304 Stainless Steel Construction Polished Stainless Tips, End Pipes and Mufflers Increase of Horsepo...

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    $1,328.49
    $1,328.49 - $1,328.49
    $1,328.49
    $1,223.39
    $1,223.39 - $1,223.39
    $1,223.39
    Save 8% Save %
  • 2003-2007 Infiniti G35 Coupe Power Hood [Fiberglass] - 1036007
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    2003-2007 Infiniti G35 Coupe Power Hood [Fiberglass] - 1036007

    STILLEN
    $1,282.65
    $1,282.65 - $1,282.65
    $1,282.65
    $1,220.55
    $1,220.55 - $1,220.55
    $1,220.55
    In stock

    Product Features Fiberglass Power Hood Clears STILLEN Supercharger Ready For Final Prep and Painting Uses Stock Hardware for Mounting Does Not Shi...

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    $1,282.65
    $1,282.65 - $1,282.65
    $1,282.65
    $1,220.55
    $1,220.55 - $1,220.55
    $1,220.55
    Save 5% Save %

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