XRAY 303180-H Carbon-Fiber Fusion Rear Right Lower Arm Hard for X4  [XR-303180-H]

CFF Rear Lower Arm Built for XRAY X4 Performance

The XRAY 303180-H CFF Carbon-Fiber Fusion Rear Lower Arm is engineered for the XRAY X4 line. This right-side arm uses a bonded carbon fiber plate and composite shell to produce a component that is both light and robust, improving suspension precision on race surfaces.

Tuned Stiffness for Predictable Handling

By combining the inner carbon fiber plate with an outer composite layer, the arm achieves a controlled mix of rigidity and give. The plate thickness determines overall stiffness while the composite body moderates flex and rebound, delivering steadier handling through a range of cornering speeds.

Set Up for Carpet and High-Grip Asphalt

The hard variant suits drivers chasing sharper turn-in and reduced squat on high-grip carpets and asphalt. Compared to softer arms, this version helps the car rotate cleanly and keeps momentum through technical sections.

Fitment Notes and Simple Installation

Designed as a right-side replacement for the XRAY X4 chassis, this rear lower arm installs with standard hardware and is a direct fit for hobbyists familiar with suspension swaps.