Mugen MTX-5 Spring Cup (7075 HARD) by Arrowmax AM-MTX5-H2703  [AM-MTX5-H2703]

MTX-5 Spring Cup, 7075 HARD

This Arrowmax AM-MTX5-H2703 spring cup is an RC-scale replacement part designed for Mugen MTX-5 shock assemblies, machined from 7075 aluminum for a harder wear surface compared with standard alloys. It serves as the spring seat component that locates and retains the shock spring on the shock shaft, contributing to consistent spring position and predictable suspension response during setup and tuning.

Fit and role: the part is intended specifically for MTX-5 compatible shock platforms and works as a direct replacement or upgrade where the original plastic or softer metal spring seat is fitted. Because it is a hard 7075 alloy component, it helps reduce wear at the spring contact point and preserves spring indexing under repeated runs, which is useful when iterating ride height and damping settings.

Installation notes: inspect mating surfaces for burrs or debris before assembly, slide the spring cup onto the shock shaft to confirm smooth travel, and use the original retaining hardware and recommended torque for the shock assembly. Avoid forcing parts that do not align, and check spring preload and free length after installation to verify expected suspension behavior.