A hybrid recirculation catch can kit that solves many of the issues with vent-to-atmosphere setups. Currently suited to single turbo kits with 4" or 5" intakes and cars running front mount intakes (FMI).
Why recirculate?
1. Smell. Vent-to-atmosphere setups can push exhaust-like fumes through your cabin vents.
2. Oil spray. Open catch cans can spray oil across a freshly cleaned engine bay. This catch can design scrubs most of the oil, water, and contaminants from the crankcase gases so only the hydrocarbons are sent back through the engine, which is what the factory PCV was doing anyway. These cars still make huge power this way.
3. Negative crankcase pressure. For single turbo builds, NRW's billet velocity stack acts as a vacuum port, drawing pressure from the catch can and valve cover. Negative case pressure frees up horsepower lost to blow-by, similar to a vacuum pump on drag and race cars, without pulling so much vacuum that it draws oil from the engine. For FMI cars, a dedicated bracket mounts the can and ties into the intake elbow for the same recirculation and negative-pressure benefit.
What's included
Everything except the AN lines, since routing varies widely between turbo kits and custom lines give the best fit. The kit includes a dipstick. Hoses are not included; please confirm what your setup requires before ordering.
Tested for over a year on NRW test cars at upwards of 50 psi of boost on both pump gas and E85. Works with NRW billet valve covers or kits that run a 2x 10AN catch can system.