This Arrowmax AM-MTX5-H2703 spring cup is offered as an RC replacement for Mugen MTX-5 shock assemblies, CNC-machined from 7075 aluminium to deliver a harder wearing surface than standard alloys. It acts as the spring seat that locates and holds the shock spring on the shaft, aiding consistent spring placement and predictable suspension response during tuning sessions.
Role and fitment: made for MTX-5 compatible shock platforms, the cup installs as a direct replacement or upgrade where an original plastic or softer metal spring seat is fitted. The 7075 hard alloy reduces wear at the spring contact point and helps preserve spring indexing under repeated runs, useful when refining ride height and damping settings.
Installation tips: clean and inspect mating surfaces for burrs or debris before assembly, slide the cup onto the shock shaft to check for smooth travel, and secure using original retaining hardware with the recommended torque. Do not force components that are out of alignment, and re-check spring preload and free length after installation to confirm expected suspension behaviour.
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