This kit is made up of five key components: TiC STi Shift Linkage Bushings, Kartboy Front and Rear Shifter Stay Bushings, the Kartboy Shifter Lever, and the new 6MT Pivot Bushings. Together, they transform the shifting experience in your Subaru WRX STi.

The Complete Setup

• Combine the bushings and lever, and you get a shifter setup that transforms your car. Every gear snaps into place with satisfying precision, making the entire driving experience more engaging and enjoyable. Warning: once installed, you may find it impossible to resist snapping through the gears.

TiC STi Shift Linkage Bushings

• These replace the soft rubber bushings in the shift linkage joint. Over time, the stock bushings “pack out,” creating excessive side-to-side slop at the end of the stick. Whether your STi is an early or later model, and whether you have the stock shifter, STi/SPT short shifter, or another aftermarket lever, the stock bushings allow sloppy, vague shifts. Our stiffer polyurethane bushings minimize side-to-side play, prevent packing out, and give your shifts a much more positive, precise engagement—while keeping NVH close to stock.

Kartboy Front and Rear Shifter Stay Bushings

• Subaru uses soft rubber for the shift lever’s hard mounting points, which results in vague fore-and-aft motion. The Kartboy stay bushings replace the stock rubber with stiffer urethane, eliminating slop and giving each gear a crisp, positive click. The result is a shift feel that is much tighter and more responsive.

Kartboy STi Shifter Lever

• With a 1-inch height reduction and redesigned mechanical leverage, it delivers a 40% throw reduction. CNC machined and TIG welded in the USA, this lever pairs perfectly with the bushings above, delivering precise, confident shifts while retaining the factory reverse lockout.