Air/Oil Separator H/D Milwaukee 8 Tour Models

The Air/Oil Separator H/D Milwaukee 8 Tour Models by MOROSO is engineered for riders who demand reliability and engine longevity from their Harley-Davidson touring rigs. Crankcase vapors—a mixture of oil mist and combustion gases—accumulate in modern air intake systems, reducing efficiency and contaminating your intake valves and combustion chambers. This separator intercepts that vapor before it reaches the engine, protecting critical components while restoring proper breathing dynamics to your Milwaukee 8 powerplant.

MOROSO's design uses centrifugal separation and baffling technology to distinguish oil particles from ambient vapor, allowing only clean air to flow into the intake manifold. The unit captures and returns separated oil directly to the crankcase, eliminating the buildup that causes carbon deposits on intake valves and reduces combustion efficiency. At just 2.1 pounds and measuring 6 x 5 x 9 inches, this compact separator fits seamlessly into the engine bay of Milwaukee 8 Tour models without requiring extensive fabrication or routing modifications. The robust construction withstands engine heat, vibration, and the rigorous demands of long-distance touring.

Owners of Road Glide, Street Glide, and Ultra Limited models benefit most from this upgrade, especially those running higher-mileage engines or frequently touring in varied climates where vapor condensation is problematic. Installation is straightforward for mechanics familiar with Milwaukee 8 intake plumbing; the separator connects between the crankcase ventilation port and the air cleaner inlet. Whether you're preparing for cross-country touring or extending the service life of a stock engine, this MOROSO air/oil separator delivers measurable gains in intake cleanliness and combustion efficiency.