How can you tell the difference between SiR2 camshafts and just SiR camshafts? I heard one way you can tell is the threading at the end of the cam. Is this true; and if so or if not, is there anyway else to tell?

Thnx

 

Also how good are the SiR2 internal head parts, like valve springs, retainers, camshafts, etc. Also how do CTR and ITR camshafts match up?

how do they compair with other after market internals?

thnx


Modified by Ditdogs at 4:33 AM 3/8/2004

 

did a search and nothing came up

 

no one knowns?