Man Show has a great point. They don't really do anything for REAL performance vs. price on these cars, but when you find one you're happy with, that's all that matters. I got the SPT exhaust on mine and I still feel like it drones out a bit too much at 75-80 unless I'm off the gas and decelerating. I wouldn't say it's really loud in any other instance, but that's what makes it a little difficult. Anyway, check Youtube for a little while and find clips from the back revving, and also drive-bys, as you'll really hear it under load too. Most of the clips have something else combined, like a BOV or something, but you'll get the general idea. Good luck!