toook a tour at the local pypes factory ??? joke made in china, offices cause i was at ther espring car show,,,, i inquired about a exhaust for my 02 ram,,didnt think they would have it,,was on sale at the time turbo back on sale stainless was told under 400 bucks,, tried to convince me i would see 4 to 5 more MPG,,,i still havent changed the exhaust yet, but i have replaced the factory muffler and tail pipe,,muffler was perfect to orignal auto parts tail pipe,,,made by walker is terrible,,not mandrel bent,,more like bent in a vise with a hammer,, im not looking for performance my truck is stock,,but i like the idea mentioned lower temps,,,,