Beisan S54 Billet Exhaust Hub Upgrade (BS027)
Beisan Systems Billet Vanos Hub for S54 engines, as found in the E46 M3, late Z3 M and Z4 M models.
The original S54 exhaust cam hub (AKA Vanos hub) is prone to failure, whereby drive teeth for the Vanos oil pump disc snap and can fall into the engine, causing catastrophic failure. Beisan’s 4140 steel hub is machined from billet instead of a forging, meaning that production processes can be highly optimised for a far stronger design, which is then FNC hardened. The result is a virtually bulletproof solution at a fraction of the cost of a new, inferior BMW part.
A must-do upgrade for any S54, and also a far more cost-effective repair piece for those who have suffered the all-too common hub failure. Combine with our Hack Engineering Vanos Oil Pump Disc Machining Service for perfect results.
3 in stock (can be backordered)