XRAY 303838 X4 Rear 1.8MM Anti-Roll Bar UAM Under Arm Mount  [XR-303838]

Improve XRAY X4 stability with a low mounted 1.8MM rear bar

The XRAY 303838 - X4 Anti-Roll Bar UAM is a practical upgrade for X4 owners who want finer roll control. The 1.8MM rear bar sits under the suspension arms to lower the center of gravity, helping the car feel steadier through fast corners without changing setup geometry.

Precise, low-friction roll control

This anti-roll bar uses an external ball-bearing mount on the bulkheads to keep movement smooth and repeatable. Bearings allow quick, accurate adjustments so you can tune roll stiffness without binding or inconsistent play.

Simple setup and clear markings

Laser-engraved stripes mark the bar thickness for fast identification, and the height is adjusted with a single screw to fine-tune roll balance. The straightforward layout makes swaps and setup changes easy at the track or in the workshop.