That other guy that posted on this is about right. noone ever really does a back to back,, all guys just run a pro trans right off. ive heard guys say its .06 or so,, the more power you make the less of a gain,, or less engine speed,, less of a gain. you may pick up .10,, you may pick up .05,, who knows. for a bracket car,, thats alot of money for that gain.. dave smith from pro trans is just about the best out there,, and they are matter of fact guys,,

pro trans 661-940-7400,, only call if youre serious,, they are busy guys

jeff