Killer B Motorsport 02-07 WRX-STi GD Air-Oil Separator Wastegates head castings may need to

head castings may need to be filled down slightly for clearance

Reverse polarity and load dump protected

and Hoses and Hose Fitting Kit

forged and machined 100% in the USA

Killer B Motorsport 02-07 WRX-STi GD Air-Oil Separator Wastegates head castings may need toThis is a product weve been asked to develop for many years, and in that time there has been a lot of research, engineering, simulations, development, testing, (and repeat), with several different Subaru engines and build types, including stock engines. This process has occurred within many different seasons, exposing the Air Oil Separator to extreme environmental and driving conditions (daily driving, auto X, drag racing, dyno testing, etc.), as well