did you spot weld them at the slip joints? did you install them yourself?I put the Mopar exhaust on my 05 copperhead. It eliminates the X over and some of the cockpit heat. I love the sound esp. when I really get on it. Not too loud at lower rpm's, which is fine with me. There is a lot of tip movement as they heat up. Right now mine rattle when cold (a minute or two) and when warm finish off centered. I'll have to fuss with them a bit more to eliminate the rattle.
To catch the eye of new readers to this post:
HIGH REZ VIDEO OF CORSA TRACK ECHAUST http://www.albertfattal.com/2003%20Dodge%20Viper%20SRT-10/2003%20Dodge%20Viper%20SRT-10%20Video-06.avi
http://www.albertfattal.com/2003%20Dodge%20Viper%20SRT-10/2003%20Dodge%20Viper%20SRT-10%20Video-05.avi