XRAY 303181-M X4 Medium CFF Rear Left Lower Arm  [XR-303181-M]

XRAY X4 CFF Rear Lower Arm Medium Left - Carbon Fusion

The XRAY 303181-M CFF rear lower arm uses a carbon insert laminated into a composite body to create a unified suspension part developed for tarmac performance. This fusion approach balances rigidity with controlled flex to help the chassis find traction more predictably.

Why the fusion design matters

The carbon-composite blend delivers a targeted flex pattern that reduces unwanted chatter while keeping weight low. The medium stiffness is chosen to improve mechanical grip without compromising resilience during race use.

On-track advantages for tarmac racing

Compared with harder arms, the medium CFF gives more compliance at the contact patch which helps when grooming heat into tyres and when negotiating tighter corners on smooth circuits.

Compatibility with XRAY X4 setups

Specifically shaped for the left rear location on XRAY X4 cars, this arm fits into standard suspension geometry and supports common tuning choices used by competitive drivers.