[Dark_5.0]

They do the dyno pull in 4th gear.

Clearing the codes can make you dyno higher as you tinker with the car cause the ecu doesnt immediately compensate. But the ecu will readjust and you will lose what little HP you gained by clearing the codes.

I dont clear mine cause I want an accurate reading of how much HP my car makes on the streets.

Your car should put down some Beefy #'s

Good luck,