GrimmSpeed Red Air / Oil Separator Subaru WRX 02-07 / STI 04-21 / Forester XT 04-08 | 078006R Vehicle Model_Baja some cam gears are too

some cam gears are too thick for the OEM bolt on the Billet cams

In typical GrimmSpeed fashion

Extended cylinder length and piston stroke

Color Black Semi-gloss

GrimmSpeed Red Air / Oil Separator Subaru WRX 02-07 / STI 04-21 / Forester XT 04-08 | 078006R Vehicle Model_Baja some cam gears are tooFitment Information: 2002 2007 Subaru WRX 2004 2021 Subaru STI 2004 2008 Subaru Forester XT Features: An Air Oil Separator has one job: remove the oil from the engine ventilation system so that the oil doesn't get sent through the intake system. When there is oil in your system, it results in reduced fuel octane, higher chance of engine knock (detonation), worse emissions, and higher oil consumption. The GrimmSpeed Air Oil Separator has a unique