if you go HERE you will see at the top a piston Set A (std) and a Set B (std) and of course the .25 OS Set.

my question is, what is the difference between A and B? I'm looking to do a small rebuild and just give my engine a refresh. Nothing to crazy....yet

Thanks for the help in advance guys

Dan

 

Apparently two different pistons were spec'd to be used depending upon how the block measured at assembly. The 'B' pistons are 4/10,000 larger in bore size. I think you would have to look at what you have to know the proper replacement.. they have either no stamp on the skirt for 'A' or a 'B' stamp.

 

cool thanks for the info.

and a just making sure......when it says piston set is that all 4 or a single piston?