I need rings for KB 215 .030 pistons..i had to tear my mill down for a cleanup after cam sh** a lifter.I dont see these at KB and the only others i seen for sale is .040.What kinda rings do i need? Engine only has 3000 on it still see the cross-hatch no ring ridge.If i go with chromoly rings will they seal with a 220-240-dingle hone?A few no nothing shade tree friends like myself said they are a bear to seal,could take along time.Basically i need to find out where to get rings,engine is a mild 451.I have read nobody likes this line of piston,i dont need to know why i done read it but these are what i got Thanks for any help!This thing is going back together next weekend!

I got my 451 (4.370") rings (single moly 30 over 400) at Summitt. read this: "break in secrets" at www.mototuneusa.com EDIT yes the plateau finish from a flexhone (dingleberry) hone is excellent and highly recommended (get the right grit)

Thank you very much Robert,.030 400 is the size,my brain has been fried all week thats embarassing They have the same thickness i assume?I will go check out your link.

I get that way for weeks at a time . I'm assuming that piston is a 5/64" but do check one of the sites that show em in a lengthy list or google it (you'll know in seconds)

Yep they are 5/64.Thanks for your help Robert.Read that whole link on break in.Is that what everybody does with moly rings?Or is that a can of worms topic on here?Sounds like good sense long as a guy doesnt over rev of course.