Mishimoto Baffled Oil Catch Can System PCV Side 2022-2025 WRX

Blow-by is an unavoidable side effect of forced induction. In the 2022+ Subaru WRX with the FA24DIT engine, pressurized gases recirculated through the PCV system carry tiny oil particles that coat your intake system and valves. Over time, this leads to carbon buildup on intake valves and can lower octane levels in the combustion chamber, reducing performance and increasing the risk of detonation. Mishimoto’s Baffled Oil Catch Can helps prevent these issues by separating oil particles from the air before they return to your intake.

Air entering the catch can flows through a 50-micron bronze filter and an internal air diverter baffle, which encourages condensation and collects oil until it can safely drain into the canister. This ensures only clean air flows back into your intake system, maintaining performance and engine longevity. Unlike most AOS systems, Mishimoto catch cans are not heated, so all blow-by—including low-octane oil vapors and contaminated fuel vapors—is trapped and kept out of your engine permanently. The can is fully washable, eliminating the need to replace the filtration system over time.

The kit includes a billet 6061 aluminum can sealed with Viton™ O-rings, black CNC-machined aluminum fittings, a direct-fit powder-coated steel bracket, and pre-formed, application-specific hoses with factory-style quick-disconnect fittings for a clean, professional installation.

Features:

• Direct fit for VB Subaru WRX
• Patented billet 6061 aluminum can sealed with Viton™ O-rings
• Captures oil particles from PCV air with a 50-micron bronze filter
• Single can mounts in-line of the PCV system
• Fitment-specific bracket mounts can in an easily serviceable location
• CNC-machined aluminum barbed fittings ensure a secure connection
• Pre-formed hoses with quick-disconnect fittings for a clean installation
• 3 oz. catch can capacity allows for longer service intervals
• Reduces oil and carbon buildup in intake system and on intake valves
• Helps prevent octane degradation to reduce knock and detonation
• Internal air diverter baffle increases turbulence for improved oil separation

Installation Instructions