northern auto parts has proform roller rockers for $139.99

1. will these fit a factory roller motor with centerbolt heads?
2. if so, what stud size do i need to purchase?
3. i have a compcams 252 XR cam, would 1.6 ratio be overkill?

thanx

 

I have these with centerbolt heads. So far I have less than 10,000 miles on these rockers and two of them have already torn up. The roller on the tips are eating into the side of the rocker itself. My advice is get the crane golds for centerbolt heads. If you do not want to spend the extra money then get the harland sharp rockers. They look just like the proforms but the quality is better. One more thing that bothers me about the proforms is that I called summit to get two replacements and when I recieved them they said made in Taiwan. That probably explains the bad quality. Take it from me don't by proforms.

 

Comp sells some 1.6 RRs as well. I would think they'd work for ya, I'm getting some soon.

Maybe try a search on the review board for them.

 

wow, that truly sucks man

thanx for the warning

 

If your car is for the street, don't bother with roller rockers. They only start producing a little extra power above 5000 rpm or so, and it isn't even significant unless your engine turns 7000 rpm and makes over 400 hp.

 

1) Are they centerbolt specific. Most manufacturers will sell seperate rockers from centerbolt applications.
2) 3/8s stud size. Well maybe I should ask; what heads these are going on?
3) On what application??

I wouldn't recommend running rollers on the street either. I know people running in the 6s (1/8) that are running stamped steel (pending valve lift isn't too great). But they make roller tip steel rockers though. The fulcrums are not roller but the tips are. This should free up a little bit of power while giving you the durability of steel.