Need a muffler shop of some kind or something I cant seem to fit my N1 exhuast so that it sits and the cannister doesnt drag basically. Also I have a GS-R cat and was wondering if anyone had an O2 sensor for it?? a shitty once dont have a lot of money thanx.....THE EXHUAST SCRAPES AND I CANT FIGURE OUT HOW TO MAKE IT SO IT DOESNT IF ANYONE HAS IDEAS LEMME KNOW