what are the sizes of a lt1 engines rings??

 

ring size will have to do with Bore and size of your piston..if you have a .030 bore..you'll need a .030 piston w/ standard rings...on some pistions you may need to file fit your rings (which is a pain..i had a machine shop do mine)

 

I trust you are referring to ring widths (or thickness). AFAIK, the sizes are 2 mm., 1.5 mm, and the oil ring is 3.8 mm.

 

If you get aftermarket pistons get 1/16--1/16--3/16 they are the most common and cheapest.

 

are these rings hard to find in mm sizes?

 

Shouldn't be.