Moroso
Moroso Separator Ao Sm Blk Subaru Sti 08- Frt Mt In
Moroso Separator Ao Sm Blk Subaru Sti 08- Frt Mt In
Part number: 0B3CW
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- Ships direct from the brand or supplier
- Tracking emailed when it ships
- Free fitment check before you order
Listed for: Subaru StiFitment notes & questions
Moroso Separator Ao Sm Blk for the Subaru Sti 08-. Fresh fluids at the right intervals prevent most wear-related failures.
Key features
- Plumbed into a vehicle's PCV system to capture the excess crankcase vapors, residual oil mist and moisture from reentering the intake tract
- Increases engine performance from cleaner intake air
- Air-Oil Separators have billet aluminum bodies with internal baffling and mesh media
- Includes heavy duty brass inlet and outlet fittings, Fuel/Emission/PCV Vapor hose, stainless steel mounting bracket and billet aluminum mounting clamp for the body of the separator
- Some Vehicle crankcase ventilation systems require that 2 Air-Oil Separator bodies be used to properly capture and ventilate the system
Specifications
- Brand: Moroso
- Part type: Fluid
Fitment for the Subaru Sti 08-
Listed for the Subaru Sti 08-. Check your year, model and trim against the title before you order.
What it does
Using the right type and spec matters more than the brand name on the bottle. The right fluid or chemical for the job protects parts and keeps systems working the way they were designed to.
Installation & tips
- Check your owner's manual for the exact type and spec before you buy.
- Filter: Change the filter with the fluid.
- Use a service manual for your vehicle for torque specs and procedures, and keep the old part until the new one is fitted.
FAQ
Can I install it myself?
Many owners do this job at home with basic tools and a service manual for their vehicle. If you are not sure, have it fitted by a qualified mechanic.
What should I check before ordering?
Compare the part number, specifications and fitment on this page with your vehicle and with the part you are replacing.
Before you order
- Confirm your year, make, model and trim match the fitment listed above (Subaru Sti 08-).

Moroso fluid or chemical for the Subaru Sti: what to know
Using the right type and spec matters more than the brand name on the bottle.
Fitment notes
- Listed for: Subaru Sti.
- Specs, lead time and warranty come from Moroso and can change. The details above this guide are the latest we have.
Not sure it fits? Send us your year, make, model, engine and trim and we'll check before you order.
Ask about fitmentWhat else to plan for
- Filter. Change the filter with the fluid.
More for your car: Subaru Parts · Oil & fluids
Questions about Subaru Sti fluid or chemical
Will this fit my Subaru Sti?
Which type does my car need?
Where do specs and warranty details come from?
Questions & answers
No questions yet about this part. Ask about fitment, what's in the box or installation and we'll answer here.