I had a dyno ran on my 15 Limited last year that had V&H Dresser Duals and their Hi-Output mufflers. Headed to have those switched out for V&H Power Duals and 4" Rineharts. I asked the dealer if I would need the dyno ran again or just how close it would be and they said it might be a "little" off because of the pressure in the chamber but not bad. So......would there be enough difference to warrant another dyno?

 

Should be good to go as is.

 

You are correct. Rode it home and all is good