B58 Oil Catch Can

BMW F-series B58 PCV Catch Tank and Blow-by Separator

Keep your B58-powered F-series BMW running cleaner and stronger with a purpose-built crankcase breather catch tank. This high-flow oil vapour separator intercepts blow-by from the PCV circuit before it can be drawn back through the turbo inlet, helping to reduce intake contamination, keep valves cleaner on direct-injection engines, and promote consistent performance on tuned setups.

• Helps minimise oil mist entering the intake tract and turbo inlet
• Supports cleaner intake valves on DI engines and tidier combustion chambers
• Added peace of mind for cars on higher boost or ethanol blends
• Simple, effective routing from the rocker cover breather outlet
• Durable PTFE reinforced hoses with AN-10 hose ends for a robust, leak-resistant connection

Why owners choose this breather can

Tuned B58s, especially those running E blends or upgraded turbochargers, can experience increased oil vapour through the crankcase ventilation system. While this does not stop overall oil consumption, it captures the escaping oil and keeps it out of places where it can cause issues. The result is less oil ingestion, cleaner intake hardware, and more consistent performance over time.

We use this unit on our own builds and have fitted it for many customers. Feedback has been excellent for drivability, reliability, and long-term cleanliness of the intake path.

Fitment and compatibility

• Designed for F-series BMW models with the B58 engine
• Plumbs into the cam cover PCV outlet with AN-10 fittings and PTFE lined hose
• Not compatible with the factory airbox
• Developed for cars running an open-cone style intake such as the Osprey V2 or similar

Ideal for

• Stage 1 and Stage 2 remapped B58 engines
• Ethanol blends such as E30, E50 and track-oriented setups
• Aftermarket turbo applications seeking added crankcase control
• Owners wanting to reduce intake oiling and valve deposits

Installation and support

For professional fitting, choose MJ Modifications in Warwickshire. Our team installs, pressure-checks, and road-tests. Request a fitting quote at info@mjmodifications.co.uk.

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