Blow-by is an unavoidable side effect of forced induction. When pressurized gasses are recirculated through the PCV system, oil particles are carried in that air which causes your intake system and intake valves to become coated in oil. Over time this can lead to carbon buildup on valves and reducing octane levels in the combustion chamber by introducing oil to the air/fuel mixture. Direct injection engines, like the FA24DIT in your 22+ WRX, are extremely prone to harsh carbon buildup on intake valves. The Mishimoto Baffled Oil Catch Can helps prevent these issues by separating that oil mixture from the air being returned to your intake system. As air enters the catch can, it flows through the 50-micron bronze filter followed by the air diverter baffle, which helps capture those oily particles and allows them to condense until they become heavy enough to drip into the canister to be collected. This leaves the air flowing back into your intake system clean and ready to be burned again.
Vehicle Fitment
2022-2026 Subaru WRX
⚠ WARNING (California Prop 65): This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Image is for reference only; actual product may vary by application.
