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Q300 sound is the refined option in Invidia's GR STI lineup
Abrasive resistance while stiff
20mm in size
It is incredibly loud and can be downright unbearable for some owners
Killer B Motorsport Air Oil Separator Barebones Kit - 2002-2007 Subaru WRX / STI PDM_chassis-bracing Q300 sound is the refinedKiller B Motorsport Air Oil Separator Barebones Kit Subaru WRXSTi 2002 2007 The Killer B Motorsports Barebones Air Oil Separator has been designed to keep harmful oil contaminants from entering the intake system of the engine. This component will remove oil in both liquid and vapor form from the vented crankcase gasses, and it functions with a vacuum source on the turbo inlet. Turbo size will not affect the function of this air oil separator. Quality