2scoops, I like the cams I mostly always going up a hill. And they give it a little more ass. But you need to look into that other intake part it just has a better flow. Like the old corvette motor had the long intake tubes for torque. I just say it's not a hard job IF you let Silver Bullet install them on your head. I had to send mine to Rick. And he done it and send it back to me and it was done right. The first mechanic said he could do it and he bent 4-valves. You will need a fuel controller