i do not need to call them i bored a 351 ford out 040 so 4.040 last year PBM sent me mahle cast piston not coated in a mahle box NO Kidding .i mic the piston so i had a good look at them ..do they coat them now... well they may now.. BUT they own clevite now so hard to say whats going on thinking i did a 460 030 over as well with the mahles as well not coated casters