Moroso 85491 Air Oil Separator Billet Aluminum PCV System

The Moroso 85491 Air Oil Separator is engineered to protect your engine from harmful crankcase vapors and oil contamination. This precision-engineered separator plumbs directly into your vehicle's PCV (Positive Crankcase Ventilation) system to capture excess crankcase vapors and residual oil mist before they can reenter the intake tract.

Why You Need an Air Oil Separator:

Factory PCV systems recirculate crankcase vapors and oil directly back into the intake manifold, which can cause detonation, reduce octane effectiveness, and create harmful oil deposits throughout the intake tract and on valve surfaces. The Moroso 85491 eliminates this problem by separating and collecting the oil before it reaches your intake system, ensuring cleaner combustion and better engine performance.

Key Features:

• Billet aluminum construction with show-quality finish that can be polished, chromed, or powder coated to match your engine bay
• Complete installation kit includes 3/8" 90-degree inlet and outlet fittings
• Includes 60 inches of 3/8" rubber hose for flexible plumbing options
• Billet aluminum mounting clamp and bracket for secure installation
• Bottom drain port with elbow fitting for convenient, mess-free oil drainage
• Universal fit design works with most PCV system configurations

This air oil separator is ideal for high-performance street vehicles, track cars, and turbocharged applications where increased crankcase pressure and oil vapor are common issues. Regular draining of collected oil helps maintain optimal PCV system performance and protects your intake system from contamination.