Supercharged Yaris: 2.25" header back w/ resonator and magnaflow muffler.

[dallas]

I had the same muffler on a twin cam 1.9 saturn engine, it sounds great but on long hiway trips it was very hard to take. It got to the point I changed it for a magnaflow that had the silencer option that way you could add the silencer if I had a long trip.

Check that you have equal pressure from both sides, my exhaust pipe came in at an angle so more exhaust went out one side, when they straigtened the pipe in and I had even exhaust flow out both tips it got a bit quiter.