Moroso 85721 Air Oil Separator for Harley-Davidson Twin Cam with S&S Teardrop Air Cleaner

The Moroso 85721 air oil separator is a performance-enhancing catch can system specifically designed for Harley-Davidson Twin Cam engines equipped with S&S Teardrop air cleaners (part numbers 170-0303B, 170-0304B, 170-0305B, and 170-0312B). This precision-engineered system maintains the proper function of your H-D cylinder head breather system while capturing harmful crankcase contaminants that would otherwise compromise engine performance.

Key Features:

• Filters out crankcase vapors, oil mist, and condensation before they enter the intake system
• Polished billet aluminum body with black anodized accents for premium appearance
• Internal baffling and cleanable mesh media for effective separation
• Keeps air filter, throttle body, intake, pistons, and valves free from excessive oil and carbon buildup
• Re-circulates clean filtered air back into the intake while collecting contaminants in the separator
• Complete kit includes all necessary hardware and fittings for installation

By preventing oil mist and vapors from re-entering your engine's intake tract, the Moroso 85721 helps maintain optimal combustion efficiency, reduces carbon deposits, and extends engine life. The durable billet aluminum construction ensures long-lasting performance while adding a premium custom look to your motorcycle. Note: This product is not CARB-approved and is not legal for sale or use in California.