boarderline Posted February 22, 2013 Share Posted February 22, 2013 I am working on rebuilding my rb25. I found a few pistons with broken ring lands. I am ordering new pistons but they need to know the grade of piston. Are one of the numbers on the top on the piston what grade it is? I am pretty sure its a grade 2 because there is a 2 on the top of the piston but I am not sure if that is where they have it stamped. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.