2002 was a transition year for the cat-back Saleen exhaust system. Early cars used a system from Borla, mid-to-late cars used a system from MagnaFlow.
Regardless of which system, the entire tailpipe length was unique to Saleen applications. The pipes were longer to compensate for the extended distance rear bumper cover.
If you're just looking for sound, you can try an H-pipe swap with less converters.
If you end up cutting the OE mufflers/system apart... just keep in mind it was Saleen specific deal... and someday it might be looked upon as a bad idea.