HS11STIGTT. Fitment Information: This exhaust fits 2009 - 2014 Subaru Forester XT, 2008 - 2014 Subaru Impreza WRX Sedans, and 2008 - 2014 Subaru Impreza WRX STi Sedans. Features: It comes with new gaskets and hardware, is made of 304 stainless steel, has a 3 - inch piping diameter and a 4 - inch titanium exhaust tip. The resonated mid - pipe and dual - exit design give it a great sound. It also includes a silencer. The exhaust hangers are welded onto OEM locations for a direct fit. Notes: The Invidia N1 is one of the best - sounding, fitting, and looking cat - back exhausts for your GR/GH WRX/STi. Installation is a breeze - just remove the old quiet exhaust, install the Invidia N1, start the car. If you're using the factory downpipe, you'll need a cat - back adapter from GrimmSpeed, Invidia, or Torque Solution.









Using this Invidia exhaust is super easy. First, you have to remove your old, quiet exhaust system. Make sure to keep all the bolts and parts in a safe place. Once removed, take your new Invidia Dual N1 exhaust and use the provided gaskets and hardware to install it. The exhaust hangers are already welded onto the OEM locations, so it should fit right in. After installation, start your car and enjoy the new, improved sound. As for maintenance, keep an eye on the gaskets and hardware. Check them every few months to make sure they're tight and in good condition. Since it's made of 304 stainless steel, it's quite durable, but it's a good idea to clean it regularly with a mild stainless - steel cleaner to keep it looking shiny. Also, remember if you're using the factory downpipe, you need a cat - back adapter from the recommended brands.