Air/Oil Separator H/D 88-16 EVO Twin-Cam

The Air/Oil Separator H/D 88-16 EVO Twin-Cam by MOROSO is an essential upgrade for serious Harley-Davidson enthusiasts running aftermarket breathing modifications or high-performance tuning. Designed specifically for the legendary EVO and Twin-Cam powerplants, this separator addresses a critical issue: excessive crankcase pressure and oil vapor recirculation that degrades engine efficiency, fouls intake systems, and compromises long-term reliability. Whether you're running a Stage II engine kit, turbo charger setup, or simply pushing higher boost levels, this separator becomes non-negotiable for protecting your investment.

This heavy-duty unit employs proven centrifugal separation technology to extract oil mist and vapor from crankcase ventilation gases before they enter the intake tract. The separator spins incoming vapors at high velocity, forcing heavier oil particles to the outer chamber walls where gravity directs them back into the engine, while clean air returns to the induction system. Compact dimensions (6 x 5 x 9 inches) and lightweight construction (2.1 lbs) allow straightforward installation on tight engine bays without sacrificing durability or performance. MOROSO's engineering ensures consistent separation efficiency across idle, cruise, and wide-open throttle conditions.

Street riders, drag racers, and touring enthusiasts benefit equally from this separator, particularly those running carburetor or fuel-injection systems sensitive to oil contamination. Installation pairs seamlessly with late-model EVO engines from 1988 through 2016 models and works in conjunction with quality PCV hoses and breather boxes. Expect noticeable improvements in throttle response, cleaner spark plugs, reduced oil residue in air filters, and extended engine longevity. Compatibility with popular Harley modification packages makes this a standard addition to any serious performance build or restoration project.