BMS Burger Motorsports S55 Oil Catch Can / Air Oil Separator AOS – Double-Baffle PCV Catch Tank for BMW M2 Competition M3 M4 (F87 F80 F82 F83) – Closed-Loop Crankcase Breather, Blow-By Control Kit

Stop blow-by, keep your inlet tract clean, and protect your S55-powered M2 Competition, F80 M3 and F82 F83 M4

This premium air oil separator by Burger Motorsports is the proven way to keep oil mist and vapour out of the intake path on the S55 twin-turbo straight-six. By capturing crankcase fumes before they reach the intercooler, charge pipes and throttle body, it helps prevent valve deposit build-up and VANOS contamination, improves knock resistance, and keeps performance consistent on both stock and tuned cars.

Engineered specifically for the S55 platform

Unlike generic catch tanks, this unit was designed from the ground up for BMW’s high-output six. It mounts on the cool side for efficient condensation, uses large-bore lines with short routing for proper positive crankcase ventilation, and retains the factory closed system so there is no smell and no vent-to-atmosphere compromises.

• Dual-stage baffle core for reliable air/oil separation without clogging
• Free-flow internal design to avoid crankcase pressure build-up
• Precision CNC-machined aluminium body, anodised black for a stealth OEM look
• Short hose runs and full-diameter fittings maintain OE-level flow
• Fully sealed PCV operation, no emissions odour
• Quick to service via removable base or integrated drain plug
• Made in the USA with a lifetime guarantee on the canister

Real-world gains you can feel

Expect a cleaner intercooler core, reduced oil pooling in boost pipes, happier intake valves, and more stable octane under sustained boost. Track days, spirited road driving, or daily use all benefit from reduced oil ingestion and more consistent power delivery.

Fast install, reversible at any time

Supplied with all required hardware and vehicle-specific hoses, typical installation takes around 20 minutes and can be returned to stock easily. Servicing is simple during routine oil changes.

Fitment

• F87 M2 Competition, 2019 onwards, S55 engine
• F80 M3, 2015 onwards
• F82 and F83 M4, 2015 onwards

Why buy from MJ Modifications

We run this kit on our own S55 builds and customers love the results. Clean intake hardware, less mess at service time, and peace of mind when pushing hard. Want it fitted for you? Our workshop in Warwickshire offers professional installation and setup. Request a fitting quote at info@mjmodifications.co.uk.

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