Getadomtune Blow-by Retention Cap “Mostly Oil” Oil Cap Subaru WRX / STI / Forester XT / Legacy GT Color:Red HB1 Air Valve

HB1 Air Valve

Valve seat

Crappy Material

By replacing the OEM rubber with these solid billet pieces you are able to get rid of the unwanted slop and flexing of the stock units which allows for the power to go into rotating the tires

Getadomtune Blow-by Retention Cap “Mostly Oil” Oil Cap Subaru WRX / STI / Forester XT / Legacy GT Color:Red HB1 Air ValveAdd Personality to Your Engine Bay While Keeping Things Sealed Not every engine bay upgrade has to be serious. The GetaDomTune "Mostly Oil" Blow By Retention Cap combines premium billet construction with the humor every Subaru enthusiast understands. Whether you're building a show car, weekend track toy, or daily driven WRX or STI, this oil cap adds a unique touch that stands out every time the hood is opened. Inspired by the reality of crankcase blow