Right now i have Comptech piping with a universal can muffler welded on the end. I bought the car like that so dont ask. I'm thinking the original comptech muffler got damaged or something, anyways comptech piping is 63mm and i want to put a quiet WS2 muffler on it which is 60mm. I know it is tnot that much of a dowsize but would it hurt my performance any? Or should i buy the comptech muffler which is quiet also and the exact same size piping?