A guy on our local board here, has a set of Comp Cams Pro Mag 1.6 Rockers. Hes pretty sure they're NSA, but i was wonder if there was anyway to tell by looking at them to make sure they're NSA instead of SA?

 

NSA do not have guide flanges on the roller.
SA do have a pair of flanges on the roller.

 

yep, and by roller he means at the valve roller tip end. 2 little guide ears to keep the rocker aligned on the valve.

 

I think i understand what your talking about, but does anybody have any pictures just to make sure i understand?

 

Left is self aligning, the roller sits up so that there are edges of the rocker (what look like wahsers on each side of the roller ) sit down over the valve stem and keep it in place. left the NSA roller sits lower so guide plates are needed

http://www.97transam.com/gm847cam/install/IMGP2796.JPG

 

our cars take SA rockers right?

 

If you have done nothing to the car and want to put rockers on, you would need to use SA if your going with nothing else. NSA will require you to run guideplates.