Hello,

I had my exhaust removed a few months ago, repaired the holes on it, put it back on, and it was great sounding. A few days later I noticed that, the exhaust gasket (after the cats), leaking since I heard an obvious noise. I replaced the gasket, still the same sound. Replaced it again with a better quality, and applied some muffler cement in case if the 2 sides of the exhaust that joins wouldn't be perfectly flat. Still the same noise, but couldn't find the leak on the gasket (no black lines, no blowing when I checked it with my hand). So I can't figure it out what causes the flutter. The sound is like "ts-ts-ts-ts :'D", cycling and gets faster when I raise RPMs. Any ideas? (Exhaust manifold gasket is brand new too)