Sale

Air and Fuel› Air and Fuel Cooling Systems and Components

Perrin Performance

PERRIN 02-21 Subaru WRX / 04-21 STI Air Oil Separator - Black

$529.00 $396.75 Save $132.25

SKU: P004 PSP-ENG-620BK

In Stock
In Stock
Ships by Aug 8
Free Shipping over $100
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Part #: PSP-ENG-620BK

MIA's Description

The PERRIN PSP-ENG-620BK Air Oil Separator for 2002-2021 Subaru WRX and 2004-2021 STI features a high-capacity baffled design with a black anodized finish. It traps oil vapor, prevents blow-by contamination, reduces carbon buildup on intake valves and turbo, and maintains a clean intake charge. It is a bolt-on replacement for factory PCV system components, with an estimated installation time of 1-2 hours. Professional installation is recommended. It works with stock ECU and noticeable gains can be achieved without tuning. Periodic draining (every oil change recommended) is necessary to remove collected oil.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandPerrin Performance
Part NumberP004 PSP-ENG-620BK

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy