B58 BMW/Supra BMS Oil Catch Can Oil Filler Cap Dual Vent Connection Kit
B58 BMW/Supra BMS Oil Catch Can Oil Filler Cap Dual Vent Connection Kit
B58 BMW/Supra BMS Oil Catch Can Oil Filler Cap Dual Vent Connection Kit
B58 BMW/Supra BMS Oil Catch Can Oil Filler Cap Dual Vent Connection Kit
B58 BMW/Supra BMS Oil Catch Can Oil Filler Cap Dual Vent Connection Kit
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B58 BMW/Supra BMS Oil Catch Can Oil Filler Cap Dual Vent Connection Kit

£180.70
£180.70
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Unlock true dual-vent crankcase ventilation on your B58 with the BMS Oil Filler Cap Dual Vent Connection Kit. This CNC machined billet aluminium oil filler cap replaces the factory cap and adds a dedicated breather outlet, allowing you to route both the valve cover breather and the crankcase vent into your BMS oil catch can. The result is increased oil vapour capture and cleaner intake air for a more effective PCV system. Supplied by Nforcd, this is a popular, proven upgrade for BMW B58 and Toyota GR Supra owners.

  • Dual-vent solution for B58 PCV: adds a second breather port from the oil filler cap to your catch can for enhanced blow-by management
  • Precision CNC billet aluminium cap that securely replaces the OEM oil filler cap
  • Helps reduce oil vapour recirculation to support cleaner intake valves and tract
  • Designed to work with BMS oil catch cans on Gen 2 B58 BMW, Gen 3 B58 BMW and B58-powered Toyota GR Supra Mk5
  • Great choice for tuned or higher-boost builds seeking improved crankcase ventilation and protection
  • Complete kit for a tidy install: fittings, high-temp hose, T-piece and clamps included

What’s in the box
1 x BMS B58 BMW billet oil filler breather cap
1 x -12ORB 90° to -12AN fitting
1 x -12AN barbed straight fitting
1 x Heavy-duty custom silicone hose
1 x Barbed PCV T-fitting
3 x Hose clamps

Vehicle compatibility
Gen 2 B58-powered BMW and Toyota GR Supra, and Gen 3 B58-powered BMW, including:
- 2022+ BMW 2 Series G42 M240i
- 2019+ BMW 3 Series G20 G21 M340i
- 2021+ BMW 4 Series G22 G23 G26 M440i
- 2020-2026 Toyota GR Supra Mk5 B58

Installation note
This cap installs differently to the OEM cap. Align the grooves with the tabs on the filler neck, push fully down, then twist tightly. Ensure the cap is properly seated and sealed before use to prevent leaks.

Nforcd knows this BMS dual-vent kit well and it has been a popular choice for customers upgrading their B58’s PCV system. Order yours today, or if you would like it professionally installed, fitting is available at Nforcd in Warwickshire. Request a fitting quote via Sales@nforcd.com.