XRAY X4 Carbon Plate Suspension Arm Upstop (2)

The upstops are mounted right next to the lower arms on the chassis, and are easily set using a small set screw to limit the travel of the front or rear suspension.
The upstops will remove grip from the end of the car where they are in use, and the effect can be altered in tiny increments.

When used in the front, a more aggressive upstop setting will reduce steering and can help improve drivability, especially in modified for high-speed tracks.

When used in the rear, the bump-stop can reduce rear grip to help free up the car, especially for spec classes in high grip conditions. The upstops are mounted using minimal hardware for a lightweight design which helps retain a low CG and centralized weight.