"Diamond also offers coatings at time of order. IDK that when I ordered mine..."
I didn't know either but at $50 on 2010 dollars...I probably came out a little cheaper anyway. But if I had known, I woulda had Diamond do it. but then, my use of coating was really an afterthought, I hadn't planned on it at the time I ordered the pistons. I like to keep an element of calamity in everything I do, lol