The Invidia N1 Cat - Back Exhaust (HS15SW4BGR1GT) is a top - notch upgrade for your 2015 - 2021 Subaru WRX or WRX STi. It comes with new gaskets and hardware, ensuring a hassle - free installation. Crafted from 304 stainless steel, it offers durability and corrosion resistance. The 3 - inch piping diameter and 4 - inch titanium exhaust tip enhance the exhaust flow and give your car an aggressive look. The non - resonated mid - pipe and single - exit design create a powerful and throaty sound. It also includes a silencer, allowing you some control over the noise level. The exhaust hangers are welded onto OEM locations for a direct fit. This cat - back exhaust offers a great balance of performance and style. If you're using the factory downpipe, you may need an adapter from GrimmSpeed, Invidia, or Torque Solution. It's a cost - effective choice for those seeking a loud single - exit exhaust.

Using this Invidia N1 Cat - Back Exhaust is a breeze. First, turn off your car and make sure it's cool. Then, remove the old, quiet exhaust from your 2015 - 2021 Subaru WRX or STI. Take the new Invidia N1 exhaust and use the provided new gaskets and hardware to install it. The exhaust hangers are already welded onto the OEM locations, so it should fit right in. Once installed, start your car and enjoy the new sound. Note that this exhaust is quite loud, so be mindful of your neighbors. If you're using the factory downpipe, don't forget to get a suitable cat - back adapter from GrimmSpeed, Invidia, or Torque Solution. For maintenance, regularly check the gaskets and hardware for any signs of wear or looseness. Clean the 304 stainless steel piping and the titanium exhaust tip with a mild cleaner to keep them looking great. Avoid using harsh chemicals as they may damage the finish.