Description
SPL Parts Toyota Supra GR A90 Solid Differential Mount Bushings is a chassis-specific suspension upgrade engineered for drivers who want more precise geometry control from Toyota Supra GR A90 Solid. SPL Parts is a U.S.-based performance-suspension specialist that develops motorsport-oriented chassis hardware for precise alignment, low compliance, and repeatable setup changes.
These rigid differential-mount bushings reduce drivetrain movement by replacing the compliance of the factory mounting system. Limiting differential rotation improves driveline response during throttle application and lift, helping the rear suspension receive torque inputs more consistently instead of absorbing part of the load through bushing wind-up.
Why it matters: On this application, the goal is to keep the tire and upright closer to the intended alignment as loads rise, giving the driver a more repeatable platform for braking, turn-in, mid-corner balance, and power application. Because solid mounting transmits more gear and driveline vibration into the chassis, it is primarily aimed at performance builds where response and durability take priority over NVH isolation.
This type of hardware is most effective as part of a complete alignment strategy, where camber, caster, toe, ride height, and tire behavior are evaluated together.