NG900 & OG9-3 Performance, Mods & Tuning
I've got a '99 9-3 with a stage 2 ecu setup on it. It still has stock exhaust but I was thinking about either chopping one of the mufflers or adding an exhaust cutout between the resonator and the rear muffler. Any ideas on which would be better? Another thing, if anyone has done something like...