Roller Rockers

[Orodi]

which are better steel or aluminum roller rockers?

[Walter]

You typically dont see a steel rocker arm with roller fulcrum/tips. The stock die-formed units are steel.

[k062693w]

Someone else may know more about them, But I can find just as many steel roller rockers online as I can aluminum.. So personally, I don't think there would be much of a difference.. Depending on your goals/expectations from your motor.
What are you building and trying to get out of it ??

[Orodi]

Comp cams has offers a set of chrome moly steel rocker arms and are "Pro Magnum Rockers are made of 8650 chromemoly steel, which is approximately three times stronger than 7075-T6 (the aluminum typically used for rocker arms)."

[Orodi]

Pro Bullet 331 AFR 185 heads 30 Lb injectors Edlebrock RPM performer II manifold, Anderson Ford N-61 Cam Full tube exhaust TKO 600, 3:73 Gears

[Walter]

Comp cams has offers a set of chrome moly steel rocker arms and are "Pro Magnum Rockers are made of 8650 chromemoly steel, which is approximately three times stronger than 7075-T6 (the aluminum typically used for rocker arms)."

I was thinking ductile iron for some reason. I think alum rocker would fit the bill.