100% CNC-machine piston domes Hard anodized domes for reduced carbon build-up Heat resistance and M0S2 coated skirts for excellent break-in protection and properties Carefully developed for the highest level of quality Unsurpassed in functionality and reliability Ready to serve reliably for years to come Forged Piston Kit (FX-10042-B) by Namura Technologies Inc.�. Piston size: 76.81 mm. Oversize: +0.01. Namura Technologies Inc. Forged pistons offer dyno-proven gains in performance and durability over industry-standard 4032 forged pistons. Namura Technologies Inc.'s exclusive forged alloy offers lower expansion rates, allowing for tighter build tolerances and superior tensile and yield strength at operating temperatures. Pistons Rings Circlips