finally figured out why my truck didn't seem fast enough. wife has been driving it and it stalled on her tonight. got very hot and very little emissions from the tailpipe. tried to punch a hole in it pre-cat on the side of the highway but couldn't so i beat the hell out of the converter and she started right up. it wheezed all the way home (20+ miles) but it made it. btw= this truck JUST turned 50K miles! the good news is that she asked me what an exhaust cost. can you say spin-tech?!