i'm looking at buying 2 of the 3" to 3" chambered mufflers from summit since i'm designing my own dual 3" setup. i'm also wondering how well they sound, i want my car VERY LOUD but yet to sound good, and i wanna know how well they perform? say a mild 383, 11:1 comp, sittin a little over 400 hp? also, what does everyone think about making my own "X-pipe" or crossover pipe... i'm wondering how well they benefit performance and sound and if its worth it for me to bother creating one... thanks!