Originally Posted by Project89
those are the actual gm numbers underated or not thats what they were sold as
and they do have different cams its been verified on tgo the ecms even have different tunes from auto to manual
I'll have to look but I have 3 ecu's 2 5spd and one auto with same prom#
the manual was extra cost option.. no one would buy is they both made the same hp..
I'm gonna look it up. cause a different cam and tune would be a different ro# engine..
only difference iirc is where they pulled the # off the dyno sheet.. 4000rpm and 4400 on the other. wink wink