this is my car with the same mufflers you probably have with a lethal o/R H and the lund lope tune. dont mind the "flowmaster classic" the first few weeks these mufflers were out they were called classic then they just changed the name.
http://www.youtube.com/watch?v=f7O1js1yPkI
just search for boostaholic01 and most of those videos minus when it had a supercharger were all with the H pipe. the ones with the supercharger were with long tube headers and X pipe.