Perrin Black Air Oil Separator 2002-2007 WRX/STI w/ TMIC | PSP-ENG-605BK

Maximize intercooler efficiency and protect your engine by preventing oil buildup in your intake system. The AOS captures blow-by oil before it enters your intercooler, maintaining optimal heat transfer and preventing power loss and detonation.

Key Benefits:

• Reduces carbon buildup on intake valves, combustion chamber, and intake tract
• Prevents oil deposits that decrease intercooler efficiency over time
• Protects against power loss and engine-damaging detonation
• Minimizes valve train wear and tear

Heated Base Plate Technology

The coolant-heated base plate maintains the AOS at engine temperature, reducing water condensation and allowing efficient oil-vapor separation. This eliminates nearly all sludge buildup, drastically reducing maintenance frequency.

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