I put DynoMax mufflers on my 340 with a 2.5" system. I think they sound great at idle and cruise, you can hear yourself think and only the tiniest bit of drone. But step on the pedal and they let you know the beast is alive. These are the same mufflers TTI uses in their complete systems. I bought them and a semi-generic tube kit from Summit. When I put the car back together, I'll probably add 12" resonators at the back to tone it down just a bit.
