A close-up of a Ross piston. The bottom looks like it just came from the shop. The black coloring on the skirt is Moly-Cote from Swain-Tech coatings. The gold-colored band just above the skirt is the Gold-Top coating, also from Swain-Tech. I need to see if you can get pistons recoated...if I can find out if the pistons will give me 11.0:1 CR as they are or if the were meant to be used with the DPR head. You'd think I already knew this, but no. I'm not that bright.