I had a 2.25" madrel bent set up under my car with a hi-flow cat and a single muffler, it droned like all buggery and I couldn't stand it any longer, even though it was almost perfect on the outside. I sent it in for a resinator and it comes back quiter in the car and louder outside the car, so I am stoked. I find it quite strange though, is this the norm? I suppose it will take some time to wear in and the note may change?
All people in Brisbane I can strongly recommend Bayside Mufflers for all your exhaust needs, they are located in Wynnum/Manly near the Waterloo.
Proud OQE Operator
and TW Operator