New Dyna with Big shots (with quiet baffles) and new air intake. Bought the super tuner pro and had it dyno'd. Runs a lot better but decal popping is pretty bad. Took it back to dealer to re-dyno to fix the popping. Now it's a little worse. They say that's as good as it can be with that exhaust. I do not believe that is the case. $1800 later I am not happy. Anyone with Big shots and no popping?

Thanks

 

Check for exhaust leaks; check exhaust flanges and the slip joint where the muffler fits on the header pipe. Leaks at either place will cause decel popping. Could be the exhaust gaskets were buggered when the pipes were installed. If that all checks out, find another tuner.

 

+1

It's very common, and most likely is the culprit.