Moroso 85602 PCV Air/Oil Separator Small Body Catch Can Kit

The Moroso 85602 Air/Oil Separator is a small-body catch can kit designed to be plumbed inline with a vehicle's PCV system. It captures excess crankcase vapors, residual oil mist, and moisture before they can re-enter the intake tract — protecting engine internals and preserving performance.

From the factory, a vehicle's PCV system recirculates crankcase vapors and oil mist directly back into the intake manifold. Over time, this causes detonation, carbon and oil deposits on intake valves, and reduced intercooler efficiency on forced-induction applications. Ethanol-blended fuels further compound this issue by introducing additional moisture during combustion — making an air/oil separator especially valuable on flex-fuel or E85 setups.

Key Features:

• Plumbed inline with the PCV system to capture crankcase vapors, oil mist, and moisture
• Billet aluminum body with internal baffling and mesh media for efficient separation
• Polished natural aluminum finish — can be chromed, painted, or powder coated for a custom look
• Bottom drain with elbow fitting for virtually mess-free oil disposal
• Small body form factor — compact design for tight engine bays

Kit Includes:

• 3/8" NPT 90° inlet and outlet fittings (heavy-duty brass)
• 76" of 3/8" diameter fuel/emission/PCV vapor rubber hose
• Billet aluminum mounting clamp for the separator body
• Stainless steel mounting bracket

Note: Some crankcase ventilation systems may require two Air/Oil Separator bodies for complete system capture and ventilation.