i put on a stock mazdaspeed 3 exhaust on my sedan over the weekend. I deleted the second cat and stupidly the second resonator then extended the tip to sit flush with the bumper. It looks awesome and sounds absolutely sick! Its really deep and aggressive and sputters and pops alittle bit in between shifts :shock:. The only thing i dont like about it is thats its pretty loud (i feel like a ricer :x). I have a small exhaust leak where it bolts to the flex pipe which im gonna fix tomorrow and see how much quieter it is but im thinking about putting the second resonator back in. Think its gonna make a decent difference volume wise?