GrimmSpeed 6-Speed STI Shifter Bushing Kit Subaru STI 2004-2021 | GRM.1153.1.0

Product Fitment:

• 2004–2021 Subaru STI

Restore crisp and precise shifting in your Subaru with the GrimmSpeed 6-Speed STI Shifter Bushing Kit. Over time, the factory rubber bushings in the shifter assembly can wear out, compress, and degrade, leading to excessive movement in the linkage. This often results in a loose or vague shifter feel between gears.

GrimmSpeed addresses this issue by replacing the soft OEM rubber bushings with high-durometer polyurethane bushings designed to tighten up the entire shifter assembly. By significantly reducing flex and unwanted movement, this upgrade delivers more precise gear engagement and a more connected driving feel.

This complete kit includes both front and rear shifter bushings, ensuring the entire linkage system benefits from improved rigidity and stability. The front bushings use a firm 90A durometer polyurethane to reduce flex and sharpen shifting response, while the rear bushing uses an 80A durometer compound to balance improved performance with daily drivability.

For added durability, each bushing features precision-machined 304 stainless steel inserts that help distribute load and resist corrosion. The included zinc-coated hardware ensures a secure installation and long-term reliability.

Whether you're restoring the feel of a high-mileage STI or upgrading your drivetrain for a more engaging driving experience, the GrimmSpeed 6-Speed STI Shifter Bushing Kit provides a simple, effective solution to eliminate shifter slop and improve shift precision.

Key Features

• Replaces worn factory rubber bushings that cause sloppy shifting

• Reduces shifter play for more precise gear engagement

• 90A durometer polyurethane front bushings for increased rigidity

• 80A durometer polyurethane rear bushing for balanced performance and drivability

• 304 stainless steel inserts for improved load distribution and corrosion resistance

• Zinc-coated steel hardware for durability and long service life

• Direct factory replacement with no modifications required

Construction

• Polyurethane bushings

• 304 stainless steel inserts

• Zinc-coated steel hardware

What’s Included

• (1) Rear shifter bushing

• (2) Rear bushing sleeves

• (2) Front shifter bushings

• (1) Front bushing sleeve

• (2) M8 x 1.25 x 35mm flanged bolts

The GrimmSpeed 6-Speed STI Shifter Bushing Kit is a quick and effective upgrade that restores the tight, mechanical shifting feel enthusiasts expect from their Subaru STI.