Air/Oil Separator Univ. Large Body Black

The Air/Oil Separator Universal Large Body Black by MOROSO (MPN 85531) is an essential crankcase ventilation component for any serious performance or modified engine build. If you're running a turbocharged, supercharged, or high-horsepower naturally aspirated engine, managing blow-by gases is non-negotiable—and this separator handles that job efficiently. Whether you're upgrading a street machine, track car, or daily driver with forced induction, this universal design fits a wide range of engine bays and intercooler plumbing configurations.

MOROSO's large-body air/oil separator employs proven cyclonic and baffled chamber technology to extract oil mist and liquid blow-by from crankcase vapors before they reach your intake manifold or catch can. The black powder-coated finish resists corrosion and blends seamlessly into engine compartments, while the universal mounting design accommodates various hose diameters and bracket positions. At 3.15 lbs with compact yet spacious internal volume, it delivers effective separation without excessive weight penalty—critical when every pound counts in performance applications.

Engine builders, tuners, and forced-induction enthusiasts rely on this separator to protect turbo compressors, supercharger internals, and intake valves from oil contamination that degrades efficiency and longevity. The universal large-body configuration works equally well on LS, small-block Chevy, Ford modular, or import platforms—making it ideal for swap builds or retrofit kits. Installation pairs seamlessly with custom PCV systems, catch cans, and vacuum-controlled setups; verify hose port sizing and routing clearance in your specific engine bay before ordering.