The HS08SW4GTT Invidia N1 cat back exhaust is a top - notch choice for your Subaru WRX or STI sedan. It fits 2008 - 2014 Subaru Impreza WRX sedans and 2011 - 2014 Subaru Impreza WRX STi sedans. This exhaust comes with new gaskets and hardware, and is crafted from 304 stainless steel for long - lasting durability. It features 3 - inch piping diameter and a 4 - inch titanium exhaust tip, giving it a great look and sound. The resonated mid - pipe and single - exit design enhance performance, and it even includes a silencer. The exhaust hangers are welded onto OEM locations for a direct fit. It's one of the best - sounding, fitting, and looking cat - backs for your GR/GH WRX. Installation is a breeze: just remove the old quiet exhaust, install the Invidia N1, and you're good to go. If you're using the factory downpipe, you may need a catback adapter from GrimmSpeed, Invidia, or Torque Solution.


Using this Invidia N1 cat back exhaust is simple. First, find a safe and stable place to work on your car. Make sure the engine is cool before starting. Remove the old exhaust carefully. You'll notice that the new exhaust has hangers welded at the OEM locations, so it should fit right in. Connect it properly using the new gaskets and hardware that come with it. Once installed, start your car to check for any leaks or unusual noises. As for maintenance, keep an eye on the exhaust system regularly. Look for signs of rust or damage, especially on the 304 stainless - steel parts. If you live in an area with a lot of salt on the roads during winter, it's a good idea to wash the exhaust occasionally to prevent corrosion. When using the factory downpipe, remember to get the appropriate catback adapter from the recommended brands. This will ensure a smooth and efficient operation of your exhaust system.