The HS15SW4GTT Invidia N1 Cat Back Exhaust is a top - notch choice for 2015 - 2021 Subaru WRX and WRX STi models. It comes with new gaskets and hardware for easy installation. Crafted from 304 stainless steel, it guarantees long - lasting durability. The 3 - inch piping diameter and 4 - inch titanium exhaust tip not only look great but also enhance the performance. The resonated mid - pipe and single - exit design give your Subaru a powerful and aggressive sound. It even includes a silencer. The exhaust hangers are welded onto OEM locations, ensuring a direct fit. This Invidia N1 is known for its great sound, perfect fit, and stylish look. While it might be a bit loud for your neighbors, it'll make your Subaru stand out. Installation is a breeze: just remove the old quiet exhaust, install the Invidia N1, start your car, and enjoy the new sound. If you're using the factory downpipe, you'll need a catback adapter from GrimmSpeed, Invidia, or Torque Solution.

Using this Invidia N1 Cat Back Exhaust is super easy. First, you need to remove the old exhaust system from your 2015 - 2021 Subaru WRX or WRX STi. Make sure to keep all the bolts and parts safe. Then, take your new Invidia N1 exhaust and align it with the OEM locations where the hangers are welded. Use the new gaskets and hardware that come with the exhaust to secure it in place. After installation, start your car to check for any leaks or abnormal noises. As for maintenance, it's a good idea to check the bolts and connections regularly to make sure they're tight. If you live in an area with a lot of salt on the roads, wash the exhaust occasionally to prevent rust. Also, if you notice any damage to the exhaust tip or the piping, get it checked out as soon as possible. And remember, if you're using the factory downpipe, you must have a compatible catback adapter.