TR J-Pipe is a bolt-on solution to replace the factory J-Pipe for the 2015+ Subaru WRX. TR J-Pipe features almost 3-inch in diameter throughout the pipe to free significant amount of exhaust flow compared to factory exhaust. TR J-pipe is mandrel bent and constructed from 304 stainless steel material with lasting resistance to corrosion. J-pipe also comes with the adapter flange to use with the factory cat-back exhaust. The TR J-pipe will free up more power potential from the FA20 motor.