SHAPES › Skull Piston Image 1 of 1 Skull Piston $12.00 A skull style piston cut out. Just in case you need engine parts with a creep factor. Bare MetalSize = 3.5"w x 10.7"h Quantity: Add To Cart Added! A skull style piston cut out. Just in case you need engine parts with a creep factor. Bare MetalSize = 3.5"w x 10.7"h