Don't let a pesky exhaust leak ruin the beautiful exhaust tone from your turbo Subaru. The Mishimoto Subaru Exhaust Adapter allows a smooth exhaust flow transition between your 3" downpipe and stock sized exhaust. The engineers at Mishimoto know your Subaru was built for harsh climates, so they designed this adapter with 304 stainless steel material so it will never rust. This adapter installs in under 15 minutes and includes stainless steel hardware and a new 3" 2-bolt flange gasket, making installation simple. This exhaust adapter gets rid of any exhaust leaks when mating the Mishimoto Performance Stainless Steel Down pipe to your stock 2015+ Subaru WRX exhaust system. you know and trust.