Killer B Coolant Breather Fitting AssemblyWe're a company that likes solving problems. As some of you FA20 WRX enthusiasts have found, the 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