KEIN Rear Diff Mount Support Bar – Subaru WRX/STI 2001–2007 (KSUB004)

Reinforced Steel with 100% Rubber Bushings

Lock in drivetrain stability with the KEIN Rear Diff Support Bar.
By bracing the rear differential against the subframe, this upgrade eliminates unwanted diff movement that factory rubber bushings can’t control. You’ll feel the improvement instantly — sharper throttle response, reduced wheel hop, and a tighter rear-end feel under power.

Built from high-grade steel with precision-formed rubber inserts, this bar is made for serious street and track use.

Features

• Eliminates rear diff flex and wheel hop

• Improves traction and throttle control

• Direct bolt-on install using factory mounting points

• Increases drivetrain response and rear-end stability

• Constructed from heavy-duty steel (K02001/K02502)

• 65A durometer rubber bushings

• Polymer-painted finish (various colours available)

• Street and track tested

Fitment

• Subaru WRX/STI (2001–2007, GD/GG chassis)

Notes
Installing this part will slightly increase in-cabin drivetrain noise due to reduced diff bushing compliance.
Ideal for performance-focused builds or drivers chasing a more connected driving feel.

Condition: Brand new