Originally Posted by GSD4ME
I have a Staintune on my Xc. On Staintune`s web site they claim; 4hp power gain, 3 kilogram lighter, 92 DBA (@3500 RPM) up from 90 DBA, and easily fitted. I didn`t need a new gasket, just used the one from the standard muffler. They do have a bit of a bark under load, but Staintune say they comply with ADR`s and can provide documentation if needed. I reckon they`re neat.
Will have to have a listen to yours then.