SHAPES › Crossed Skull Pistons Image 1 of 1 Crossed Skull Pistons $25.00 A skull style crossed piston cut out. Just in case your project needs engine parts with a creep factor. Bare MetalSize = 10.75"w x 9.5"h Quantity: Add To Cart Added! A skull style crossed piston cut out. Just in case your project needs engine parts with a creep factor. Bare MetalSize = 10.75"w x 9.5"h