XRAY 302143-S X4 CFF Soft Carbon-Fiber Upper Arm - Low Traction Upgrade  [XR-302143-S]

XRAY 302143-S - X4 CFF Carbon-fiber Fusion Upper Arm - Soft - FL/RR
Price:
CAD$36.59
Brand:
XRAY
Model:
XR-302143-S
Condition:
Brand New
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Race-Proven Grip from the XRAY 302143-S Upper Arm

The XRAY 302143-S X4 CFF Carbon-fiber Fusion Upper Arm is built for club and competitive drivers who want predictable handling and improved bite. Made from a high-grade carbon inner plate combined with a softer composite layer, this arm is intended to increase mechanical grip and side traction on low-grip asphalt and carpet circuits.

Composite Bonding for Tuned Flex

XRAY uses a controlled fusion process that bonds carbon fiber with composite material to form the CFF suspension arm. The carbon center controls overall stiffness while the softer surrounding composite allows measured deflection and rebound, helping the car stay consistent through a variety of corner types.

Side-Specific Fit and Use

This component fits the front left and rear right positions on X4 series cars and is tailored for very low to low traction surfaces. Its softer durometer provides extra mechanical grip and better lateral traction, though users should be aware the softer material can be more vulnerable to heavy impacts.

Specifications

  • Material: Carbon-fiber and composite fusion
  • Hardness: Soft
  • Compatibility: Front left and rear right of X4 series
  • Application: Low traction asphalt and carpet tracks

 

Product Reviews
1 Reviews
rating
Support is very well and the service is fast and provides instant responses.
Remark :
Due to limited stock availability, please notice that some XRAY items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

How does the CFF arm change cornering balance?

The fused carbon-composite layout shifts more traction to the contact patch by allowing controlled flex, which tends to stabilise corner entry and improve rotation on low-traction surfaces.

What should I expect in terms of durability?

The softer composite increases grip but can be less impact resistant than harder arms, so avoid heavy collisions and inspect the arm after rough running sessions.

Can I use this arm with stock suspension geometry?

Yes, it is compatible with standard X4 geometry for the specified positions; changes in handling may require minor roll center or shock tuning to get the most from the softer flex.

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