The Arrowmax AM-MRX5-H2202 is a CNC-machined pulley made to suit the MUGEN MRX5 belt-drive arrangement. Forged from 7075 T6 aluminium and given a hard coating, it aims to reduce rotational mass while resisting surface wear. Side perforations are included to help shed dust and small debris from the belt interface.
Intended as a like-for-like swap for the original MRX5 pulley, it is built to preserve consistent belt engagement and lower inertia for crisper throttle response. Proper fitment, belt alignment and fastener torque are important to achieve reliable operation on on-road circuits.
Use this pulley for MRX5 belt-drive refreshes or when testing reduced-mass driveline parts; always confirm belt tracking and re-tighten hardware after the first run.
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