PLM Power Driven Subaru EWG Up-Pipe with Turbosmart WG40 Wastegate package is hands down the best value on the market today. External wastegates allow for quicker spool because they do not cause turbulence in the exhaust stream, and they give better boost control.
10hp-40hp+ gains depending on your setup or tune. No modifications are needed since it is a direct bolt-on to the OEM header or turbo.
