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Carefully Engineered.
Built to Last.

Kartboy first gained recognition among Subaru enthusiasts in 1999 for its innovative product design and precision manufacturing. Quality endures.

Drivetrain35

Short Shifters, Bushing, Shift Knobs and more

Suspension20

Endlinks, Bushings, etc

Exhaust Hangers8

Upgraded Exhaust Hangers, etc

Brakes4

Brake Caliper Adapters

Engine9

Motor Mounts, Pitch Stop, Engine Bay Dress-Up

Exterior4

Exterior Upgrades

Interior12

Dead Pedals, Shift Knobs, etc

Kartboy Gear5

“Yes, it’s true, Kartboy rocks. I just installed my STi short shifter and it feels great. There is a huge reduction in throw. The parts were top‑notch quality… Quick and easy install with the right tools… way to go Kartboy!”

— Ari Allen on NASIOC

“It’s a great upgrade, and probably the most bang for your buck performance wise for a hundred bucks… The throw is SIGNIFICANTLY shorter… much better over stock… Overall, best $138 mod you can do for your car.”

— evohuntinwrx on NASIOC

“I’ve had Kartboys on all 3 of the Subarus that I have owned, wouldn’t trade them for anything…”“…it turns your car into something completely different!”

— spritef @ r/subaru

The Original, Made in USA

Explore WRX & STI Short Shifters

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Short Shifter Bushing Combo | Subaru STI (2002-2021)

Short Shifter Bushing Combo | Subaru STI (2002-2021)

$249.00
5.0
Short Shifter Bushing Combo | Subaru WRX (2002-2007)

Short Shifter Bushing Combo | Subaru WRX (2002-2007)

$207.00
Short Shifter Bushing Combo | Subaru RS (1997-2001), WRX w/ SPT Shifter (2002-2007)

Short Shifter Bushing Combo | Subaru RS (1997-2001), WRX w/ SPT Shifter (2002-2007)

$207.00
5.0
Short Shifter Bushing Combo | Subaru WRX (2008-2014), Legacy GT (2005-2009)

Short Shifter Bushing Combo | Subaru WRX (2008-2014), Legacy GT (2005-2009)

$216.00
5.0
Short Shifter & Lockout Combo | Subaru WRX 6spd (2015-2025)

Short Shifter & Lockout Combo | Subaru WRX 6spd (2015-2025)

$95.00
Short Shifter Bushing Combo | Subaru Forester (1998-2005), Baja (2003-2006)

Short Shifter Bushing Combo | Subaru Forester (1998-2005), Baja (2003-2006)

$207.00

CNC Machined, Polyurethane Bushings

Explore WRX & STI Swaybar Endlinks

5.0
Swaybar Endlinks, Front | Subaru WRX, STI Sedan (02-14), Legacy GT (05-12), Forester (04-13)

Swaybar Endlinks, Front | Subaru WRX, STI Sedan (02-14), Legacy GT (05-12), Forester (04-13)

$135.00
Swaybar Endlinks, Rear | Subaru WRX, STI (2008-2021), Legacy GT (2010-2012), BRZ (2013-2021)

Swaybar Endlinks, Rear | Subaru WRX, STI (2008-2021), Legacy GT (2010-2012), BRZ (2013-2021)

$145.00
Swaybar Endlink, Front - Lifted 02-07 WRX Wagon/ 97-01 GC8

Swaybar Endlink, Front - Lifted 02-07 WRX Wagon/ 97-01 GC8

$135.00
5.0
Swaybar Endlink Combo, Front & Rear | Subaru WRX & STI (2008-2014), Legacy GT (2010-2012), Forester XT (2009-2013)

Swaybar Endlink Combo, Front & Rear | Subaru WRX & STI (2008-2014), Legacy GT (2010-2012), Forester XT (2009-2013)

$267.00
Swaybar Endlinks, Rear | Subaru STI (2004-2007), Forester XT (2004-2008)

Swaybar Endlinks, Rear | Subaru STI (2004-2007), Forester XT (2004-2008)

$135.00
4.5
Swaybar Endlink Combo, Front & Rear | Subaru WRX & STI (2015-2021)

Swaybar Endlink Combo, Front & Rear | Subaru WRX & STI (2015-2021)

$276.00

WHAT'S NEW:

Kartboy Enters Next Chapter with New Leadership Team of Industry Veterans

Kartboy Enters Next Chapter with New Leadership Team of Industry Veterans

  Kartboy Enters Next Chapter with New Leadership Team of Industry Veterans Wausau, WI – August 1, 2025 – Kartboy (All Wheel Engineering LLC), a trusted name in the Subaru aftermarket for more than 26 years, is entering an exciting...

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The New Shop WRX

The New Shop WRX

Kartboy recently embraced the thrill of driving with the all-new 2023 Subaru WRX. The iconic pairing of Kartboy and Subaru takes automotive enthusiasts on an exhilarating journey. The 2023 WRX, with its turbocharged power and precision handling, perfectly aligns with...

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NEW EJ Alt/Engine Covers Now Shipping.

NEW EJ Alt/Engine Covers Now Shipping.

Get some of that New New! Kartboy Bling in full effect! Dress yo engine bay up with one of these inhouse fabricated covers. 0.080 laser cut aluminum, cnc bent and laser engrave. Pick your choice of Red, Blue. Orange or the...

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New Kartboy Dead Pedals. Now shipping.

New Kartboy Dead Pedals. Now shipping.

Is your left foot jealous of your right foot? I mean who wouldn't be. It gets to control BOTH Gas AND Brake Pedals. (unless you are Colin McRae or Petter Solberg and can do LFB)  Lefty only gets to run the...

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Subaru Pitchmount Updates. New lower price. 12-13-19

Subaru Pitchmount Updates. New lower price. 12-13-19

I've upped my buying quantities now UP YOURS! That's right, I've tripled my raw materials quantities and redid the G code to shave off a few minutes of machine time. So i can pass those savings onto you. We've been...

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