JE Pistons Ultra Series GM Gen III/IV LS 4.13in Bore/4in Stroke Set of 8 Pistons

Ultra Series forged pistons from JE are the industry’s strongest, most fully featured pistons available off the shelf. Offered for LSX 12 and 15 Degree Engines. Ultra Series Pistons feature JE’s proprietary Aligned Grain Flow forging technology providing next-level tensile strength ideal for the extreme cylinder pressures of power adder engine builds. Equipped with the following custom level features