Killer B FA20 Subaru WRX 2015+ Coolant Breather Fitting Assemblythe OEM plastic breather/coolant fitting can start to leak over time, or worse, break when you're trying to remove/replace lines during a build or an AOS install.

So, in typical Killer B fashion, we have designed a no fail, no leak part. We've put our own performance spin on it as well, opening up the breather port, as the factory plastic piece is too restrictive.

Vehicle Fitment2015+ WRX FA20
 
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