The Mishimoto Baffled Oil Catch Can for your 2018+ Audi S4/S5 installs in line with the PCV system right after the factory separator for immediate protection of the intake components. Their catch cans feature a patent-pending 2-port compact baffled oil catch can with a 50-micron bronze filter and an internal baffle to better separate oil from the crankcase vapors. Their kit also includes a set of direct-fit hoses for a simple installation, including two Mishimoto One-Way Performance Check Valves to prevent your catch can from becoming pressurized. To simplify servicing, their kit includes a petcock drain kit, so draining captured blow-by is a cinch. The Mishimoto 2018+ Audi B9 S4/S5 Baffled Oil Catch Can also includes the Mishimoto Lifetime Warranty for a worry-free installation.
Their catch cans are different from most air-oil-separator (AOS) systems on a few levels. First, Mishimoto's catch cans are not heated. This means that all of the blow-by condenses in the can, including low-octane oil vapors and contaminated fuel vapors. Most AOS systems also drain the blow-by back into the oil pan, while their catch cans trap the blow-by and keep it out of the engine permanently. If you’ve seen what we’ve seen in the bottom of our catch cans, you won’t want that draining back into your oil either.
Application: 2018+ Audi S4/S5