Well i just installed a upr x pipe tonight and so far i'm kinda undecided. I heard this setup on that cobra (snakebit i believe?) and thought i'd give it a shot. I picked the x pipe used for 125 with mils and it was a local pickup so i couldn't pass it up. I drove the car for only 5-6 miles tonight and my catback is rubbing somewhere and i think is messing with the sound. Idle is slightly louder than catback+stock hpipe, but it screams when you hit the go pedal. There's kinda a 300 rpm rasp zone between 2300 and 2600. It sounds really good before and after that though. I just need to adjust my catback and see if that rubbing will change the sound. Just thought i'd share my experience since there's always exhaust questions.