Just so others will know the Icon Forged and Icon FHR pistons are not claimer pistons. The Icon Forged Premium piston is made from highest grade extruded aluminum billet. They use 2-1/16 rings and a 3/16 oil rings. The pins use spiral lock lockrings. The skirts are diamond finished. The FHR Icon Forged pistons use 2-5/64 rings and a 3/16 oil rings. The pins use a tru-arc lockring. The FHR pistons dome and valve reliefs are forged where the Icon Premium Forged are machined. The FHR pistons weigh more than the Icon Premium Forged pistons. All this information I read in their catalog.