I use the rev a nator on my 505 and cant complain of how it preform and a great benefit is of corse the built on rev limiter that WORK ! Had a new MSD soft cut rev limiter before whit a no good orange MP box and that limiter whent in the trash as it dident work together whit no good MP box. I gues you can reed some test´s where they compared the AL6 box to the rev a nator and diside for your self whitch to pick Im afraid you will end up whit recomedations of useing retrackted race plugs to in the heat range around 8 if you askt that to in a topic that i gues works fine if you only intend to rev the engine above 7000 rpm at the track but they will most likely not give you what you whish on the street if you even come out to the street before the plugs are shut down IMO Spend money whit respect and reed betwen the lines some times is my experience.