Blow-by is an unavoidable side effect of forced induction. When pressurized gases 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 reduce octane levels in the combustion chamber by introducing oil to the air/fuel mixture. Direct injection engines like the L15B7 in your 22+ Honda Civic 1.5T are 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 returning 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. The kit includes a billet 6061 aluminum can with black CNC-machined aluminum fittings a direct-fit steel powder-coated bracket pre-formed application-specific SAE J30R7 hoses and all required hardware for a clean and tidy installation in thirty minutes or less. This makes maintaining your 2022+ Civic 1.5T system a breeze as the can is also 100% washable so you never have to worry about replacing the filtration system. With all our products this catch can kit is backed by our signature Mishimoto Lifetime Warranty.