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The Whiteline KDT984 front transmission mount insert bushing kit dramatically reduces drivetrain movement and wheel hop on 2002–2021 Subaru WRX, STI, Forester XT, Legacy GT, and Outback XT models with 5-speed or 6-speed manual transmissions, featuring high-durometer polyurethane inserts that fill the voids in the factory rubber mount for sharper throttle response, crisper shifts, and improved traction under hard acceleration without the harshness of solid mounts.
Designed as a true “insert” that installs in minutes using basic hand tools, the KDT984 eliminates the excessive slop common in aged factory mounts while maintaining NVH levels close to stock. The bright red 95A durometer polyurethane resists oil and heat for lifelong performance and is the #1 selling transmission bushing upgrade trusted on thousands of tuned Subarus worldwide.
For WRX/STI owners demanding maximum drivetrain control with daily-driver comfort, the Whiteline KDT984 is the ultimate bolt-in solution for eliminating wheel hop and improving launch consistency.
California Proposition 65: Contains chemicals known to the State of California to cause cancer or reproductive harm.
Warranty: Limited lifetime to original purchaser.
| Year | Make | Model | Transmission |
|---|---|---|---|
| 2002–2021 | Subaru | WRX / STI | 5MT / 6MT |
| 2004–2013 | Subaru | Forester XT | 5MT / 6MT |
| 2005–2009 | Subaru | Legacy GT / Outback XT | 5MT / 6MT |
Note: Fits manual transmission models only. Front pitch stopper mount insert.
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