The 250 Air/Oil separator is a by product of our IS-F track development program. We finally added an air/oil separator to our IS250 line. As IS250 does not have port injectors, it can benefit the most from our Air/Oil Separator as it gets a lot of oil in its PCV line.

During on track testing and data logging, it became clear that the PCV (Positive Crankcase Ventilation) was allowing for significant ingestion of oil into the engine (see diagram in the photo gallery of this product). Oil ingestion results in ignition retard due to the low octane of engine oil as it burns up. Additionally, oil burning in the engine results in carbon deposits on the intake valves, pistons, and combustion chamber which further increases the propensity for power-robbing detonation. You don't have to take your IS to the track to benefit from our Air/Oil Separator. Anyone who drives aggressively on twisty roads with hard acceleration and deceleration will benefit from avoiding oil ingestion into the engine.

The RR-Racing Air/Oil Separator is an fully sealed design featuring an advanced zero maintenance air oil separator with a level indicator for easy inspection. We utilize only the finest quality push-to-connect fittings and urethane hoses. All you have to do is check the level indicator and periodically empty the canister.

All components in this product are proudly engineered and manufactured here in the United States of America.

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