i'm getting rid of the kb pistons anyway they will probualy find there way to the shed since no one will buy them anyway tell be afraid of buying flycut pistons and they'll never believe i didn't use them i might try posting them on ebay with a complete set of plasma moly rings and a set of legend I beam rods. the rings have been gapped so asouming your pistons to wall clearances are right the rings should have proper gap i'll probauly list them starting at 150 and hopefully get at least 200.