Carefully Engineered. Built to Last.
Kartboy first gained recognition among Subaru enthusiasts in 1999 for its innovative product design and precision manufacturing. Quality endures.
“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
CNC Machined, Press-Fit Bronze Bushings
The All-New Solid Shift Joints
The Original, Made in USA
Explore WRX & STI Short Shifters
CNC Machined, Polyurethane Bushings
Explore WRX & STI Swaybar Endlinks
WHAT'S NEW:
The History of Kartboy and Turn In Concepts
How to Install the Kartboy Short Shifter in a 2004–2021 STI
Why the Kartboy Solid Shifter U-Joint Is the Best Option on the Market. Period.
Most "solid" shifter U-joints force you to choose between tight and free-moving — tighten them down and they bind, back them off and they work loose. Kartboy's crush-tube design does both at once. Here's the engineering that actually solves sloppy shifter feel for good.
How to Install the Kartboy Short Shifter — 2015+ WRX (Cable Shifter)
Swap in the Kartboy Short Shifter on your 2015+ WRX cable-shift transmission for a shorter throw and a tighter gate — here's the full under-car install, step by step.
How to Install the Kartboy Solid Shifter Joint For 6 Speed
The factory U-joint on your 6-speed STI has rubber bushings that wear out and eventually turn your shifter into a sloppy mess. This step-by-step guide walks you through swapping in the Kartboy Solid Shifter Joint — machined from one-piece stainless steel with self-lubricating bronze bushings, roll pin removal tips, and how to get it all back together right the first time.