So just bought a used 2015 WRX with 37k miles on her last week and it came with a Perrin cat back already installed. I believe the rest of the car to be stock, spikes at 21.9 and sustains 15. I haven't gotten down under to see if a previous owner installed a J pipe/downpipe as well but by the sound I'm assume its still stock. Obviously I'm already thinking about that Cobb accessport and intake... however this car is going to be a daily with fast accumulating miles (until its bike season again at least) and I want to maintain that Subaru level of reliably. Im a newb wrx owner with a very rudimentary understanding of tuning/ building cars and I'm unsure if running this exhaust alone could cause long term damage without an intake/tune. So basically I want an excuse to order the accessport and SF intake bc its already got an exhaust but I don't want to jack anything up in the long run... Any insight or recommendations on how to approach the situation is appreciated..