OVERVIEW

The Mishimoto Baffled Oil Catch Can Kit is a direct-fit crankcase ventilation upgrade for the 2015–2020 BMW F8X M3 and M4. The S55 brought factory turbocharging to the compact M cars, and with it the long-standing tradition of blow-by. Left unchecked, oil vapor carried through the CCV system coats the charge air path and the intake valves and lowers the effective octane of the incoming charge.

The kit mounts a single can in line with the CCV system, where a 50-micron bronze filter, an internal baffle and an air diverter separate oil from the crankcase vapor. A CNC-machined lid carries inlet and outlet ports sized to match the inner diameter of the factory CCV hose, so flow is not restricted. Two direct-fit pre-molded hoses require no modification to the engine cover, and a billet aluminum bracket mounts the can in an easily serviceable position. Installation takes under 30 minutes.

Mishimoto's catch cans differ from most air-oil separator systems in two ways: they are not heated, so low-octane oil vapor and contaminated fuel vapor condense in the can rather than passing through, and they trap the blow-by permanently instead of draining it back into the oil pan. The can and filter are fully serviceable and the kit carries the Mishimoto Lifetime Warranty.

SPECS

Patent-pending billet 6061 aluminum can sealed with Viton™ O-rings
50-micron bronze filter with internal baffle for oil separation
Internal air diverter increases turbulence to improve separation
3 oz. can capacity for longer service intervals
CNC-machined lid with inlet and outlet ports matched to the factory CCV hose ID
CNC-machined anodized aluminum mounting bracket
3/4" CNC-machined aluminum barbed fittings
Pre-molded direct-fit hoses; no engine cover modification required
Non-heated, non-draining design — blow-by is trapped rather than returned to the oil pan
Filter and can are fully serviceable
Installs in under 30 minutes
Mishimoto Lifetime Warranty

PARTS INCLUDED

(1) Compact Baffled Oil Catch Can
(1) Application-specific mounting bracket
(2) Direct-fit catch can hoses
(2) 3/4" aluminum barbed fittings
(4) Worm gear clamps
(1) Mounting hardware pack
Mishimoto Lifetime Warranty

TECH RESOURCES

Additional Parts Required

None. Mishimoto specifies no additional hardware for this catch can kit.
Ongoing service item: the can should be drained and the bronze filter cleaned at regular intervals — both are user-serviceable.

Installation

Mishimoto MMBCC-F80-15CBE Baffled Oil Catch Can – Installation Guide (PDF)

PART NUMBER

MMBCC-F80-15CBE

VEHICLE APPLICATIONS

Make	Model	Chassis	Engine	Years
BMW	M2 Competition	F87	S55 3.0L Twin-Turbo I6	2019–2020
BMW	M2 CS	F87	S55 3.0L Twin-Turbo I6	2020
BMW	M3	F80	S55 3.0L Twin-Turbo I6	2015–2018
BMW	M4	F82 / F83	S55 3.0L Twin-Turbo I6	2015–2020
BMW	M4 GTS	F82	S55 3.0L Twin-Turbo I6	2016
BMW	M4 CS	F82	S55 3.0L Twin-Turbo I6	2019–2020