Originally Posted by andre12031948

However I think dynos are set up to adjust for weather/air/alt. etc.etc. Also different dynos give different results. That's some of the reasons why I'm not into it. I use it, for the same reason you are using it. Test before tune/mods then after. Looks like good numbers. Good luck with your mods & tune.
Test pipes with stock exhaust will give you more H.P. than stock cats & after market exhausts.