I just had a Spintech dual in dual out put on my 01 V10. I had a local muffler shop bend up a set of pipes exiting out the rear. Sounds great considering it's a V10. I don't think anyone makes a pipe kit for the V10's so I had mine made up. If you ever heard a Viper run, the exhaust sounds like the Viper only deeper. I had to do something. My friends all loved telling me how the stock exhauust sounded just like a mailtruck! I believe the stock pipes are 2 & 1/4 so I bought a 2 & 1/2 in-out and it worked perfectly. It slid right onto the cats like it was designed for it! Good luck.