XRAY 303183-M is a medium-hardness rear lower arm for the X4 family, constructed with Carbon Fiber Fusion to control deflection under load. It refines rear behaviour without making the rear overly rigid.
The CFF design encourages the correct amount of flex, helping the arm distribute forces and improve mechanical grip and responsiveness through corner exits on asphalt tracks.
This medium option offers more compliance than harder arms, giving drivers a more manageable rear end when track temperatures rise and grip levels change.
Manufactured to fit the left rear position on X4 series cars, this arm provides consistent alignment and dependable operation for competitive setups.
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