MUGEN MRX5 7075 Aluminum Spring Cup Upgrade - AM-MRX5-H0753  [AM-MRX5-H0753]

Replacement spring seat for MRX5 shocks

The Arrowmax AM-MRX5-H0753 spring cup is a 7075 hardened aluminum replacement designed for use on the Mugen MRX5 chassis. It serves as the top or bottom spring seat on a shock, creating a hardwearing interface between the shock spring and the shock body.

In setup work this cup keeps the spring aligned, reduces deformation under heavy loads, and lets you set preload consistently for repeatable suspension tuning. The hardened alloy finish focuses wear resistance where the spring and shock body meet, improving longevity compared with softer plastic cups.

Fitting is straightforward on compatible MRX5 shocks: remove the stock cup, place the Arrowmax cup so the spring sits evenly, then reassemble the shock checking for smooth travel and no binding. Always confirm fit and clearances around the shock shaft and spring retainer before reattaching the shock to the chassis.