XRAY 302143-S X4 CFF Soft Carbon-Fiber Upper Arm - Track Focused  [XR-302143-S]

Precision Handling with the XRAY 302143-S CFF Arm

The XRAY 302143-S X4 CFF Carbon-fiber Fusion Upper Arm targets drivers who need predictable and repeatable handling. The part blends a stiff carbon core with a softer composite sheath to give added mechanical grip and better lateral traction on low-friction asphalt and carpet layouts.

Layered Materials for Controlled Response

By fusing carbon fiber to a more compliant composite, XRAY achieves a component that balances rigidity and measured flex. The inner carbon plate sets baseline stiffness while the outer composite moderates rebound and flex to keep cornering consistent lap after lap.

Designed for Specific Wheel Positions

This upper arm is intended for installation on the front left and rear right locations of X4 series cars. Its soft rating enhances traction in low-grip conditions, but teams should monitor wear and avoid excessive impacts during aggressive running.