Originally Posted by ms372
do you have a gt2 or gt? im running challenge sport x-pipe with the gt2, even with secondary race cats and resonators its extremely loud. the moment you take out ur primary its going to be loud no matter what x-pipe you use. if you want something quieter u will have to change muffler.
I have gtc and it's loud either way. I ended up going with gintani quad res and it sounds way better much more refined