
Many aftermarket billet oil caps with ORB/AN adapters are prone to leaking oil under boost, often leaving the engine bay covered. The NRW Design S58 / B58 Billet Oil Cap was developed specifically to solve this problem.
An internally baffled design prevents oil from having a direct path out of the cap under high crankcase pressure, while precision CNC machining and tight tolerances ensure a dependable seal on high-power builds.
Features
- Internally baffled design to stop oil escaping under high crankcase pressure
- Integrated ORB/AN adapter for crankcase ventilation plumbing
- CNC machined from 6061 billet aluminium
- Tight manufacturing tolerances for a reliable seal
- Made in the USA
Fitment
- BMW G80 / G81 M3 (S58)
- BMW G82 / G83 M4 (S58)
- BMW G87 M2 (S58)
- BMW G20 M340i (B58 Gen2)
- BMW G22 / G23 M440i (B58 Gen2)
- BMW G42 M240i (B58 Gen2)
- BMW G29 Z4 M40i (B58 Gen2)