Mugen MRX5 Adjustable Upper Arm Mount with POM Inserts - MUGEN AM-MRX5-H2120 by Arrowmax  [AM-MRX5-H2120]

Arrowmax AM-MRX5-H2120 Front Upper Arm Mount With Bush Set (7075-T6)
Price:
NZD$70.33
Brand:
Arrowmax
Model:
AM-MRX5-H2120
Condition:
Brand New
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Front upper arm mount tuned for MRX5 setups

This front upper arm mount and bush set is intended for the Mugen MRX5 front suspension, giving racers a simple way to refine geometry. Crafted from 7075-T6 aluminium, the kit includes adjustable POM inserts so you can change roll centre position without replacing other suspension components. The paragraphs below explain fit, build material, and tuning effects for track and clubday use.

Use the mount when you want tighter control over front suspension behaviour; the POM inserts let you dial in small lateral adjustments to the upper arm pivot which influence turn-in feel and weight transfer. Fitting follows the MRX5 standard front arm points and uses the chassis' existing hardware.

Specifications

  • Item: Front upper arm mount with bush set
  • Material: 7075-T6 aluminium, POM inserts
  • Model Number: AM-MRX5-H2120
  • Compatibility: Mugen MRX5

A direct upgrade aimed at Mugen MRX5 drivers who prefer metal components for consistent geometry and easier roll centre fine tuning.

Can I mix these with aftermarket upper arms?

The mount is compatible with standard MRX5 upper arms; if you use third-party arms, check hole spacing and pivot diameter to confirm fit before final assembly.

Are the bush inserts removable for spares?

Yes, the POM inserts are adjustable and removable so you can replace them or try different positions to alter roll centre without changing the aluminium bodies.

Will changing the insert position affect camber or toe?

Adjusting the lateral pivot mainly shifts roll centre and the effective arm geometry; it can indirectly influence dynamic camber and toe during cornering, so test changes incrementally.

What maintenance is recommended?

Keep the pivot areas clean and check the POM inserts for wear after frequent track sessions. Tighten hardware to spec and inspect for any fretting at aluminium interfaces.

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