I had my muffler deletes installed friday. If I had to do it all over again I would go with the SLP Loudmouths, though because the Pypes MDs needed to be cut down and we had to cut off and re-weld some of the hangers. Also the ID of the tips was at least a 1/4" bigger than the OD of the piping so we had to flare the piping and TIGed the tips on to the piping. The labor would have easily cost me more than if I had just bought the LMs but luckily my buddy did it for free. After the pain of installation, though, I am very satisfied. They look and sound awesome, even my GF likes them, hehe.