Always looking for ways to make the engine bay cleaner, lighter and easier to work with, the STM Aluminum Valve Cover Fittings allow you to simply install -AN lines and fittings for a catchcan or breather right onto your valve cover. The -10AN Front Fitting removes the PCV Valve and re-uses the factory O-ring. For track & racing use only. Not intended for public roads. Vehicle Fitment: 2008-2015 Mitsubishi Lancer Evolution X • Confirm compatibility below with plastic or metal valve covers -6AN Side Fitting: Fits metal valve covers only. -10AN Front Fitting (PCV Valve Replacement): Fits both metal and plastic valve covers. For racing use only. Install Notes: The fitting itself is a very tight fit, but we would definitely recommend a touch of glue or epoxy to help hold it in place in the valve cover upon install.