This 4cyl header by RockMountainWesty will work on either a 2.2L or a 2.5L Subaru engine. This system is designed to be used with a slip on Magna flow catalytic converter and a Magna Flow muffler. The Magna Flow Converter that we use has a provision for your O2 sensor. If you have a OBD II conversion, there is a option to have a threaded bung welded into your exhaust for your second O2 sensor. Made of 3/8 thick stainless steel flanges that are custom cut on a water jet for a precise fitment. The primary tubes are 1 1/2 .065 304L stainless tubing. The go into a formed 2 to 1 16g formed stainless collector that then goes into our 2 in collector pipe which is also .065 304 Stainless.
- This exhaust system will not work with the U5 Ultra Low emission engine. Compliance with your state’s emissions requirements, if any, are the sole responsibility of the buyer/installer.
- Only works with RockyMountainWestys S.S. Exhaust Kit.