pretty much anything that comes out of Butler's shop makes a ton of power. i think they have mine tagged for around 600HP. originally i was shooting for 450-500 but it really doesn't cost that much more to go a little higher. my biggest thing was i wanted driveability over anything else. i didn't want some wild race engine that shakes the teeth out of your head. i wanted it to be smooth with a nice little rumble to it...