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JE Ultra Series forged pistons for the Mitsubishi 4G63 (Evo VII–IX) are a set of four 85.5mm bore pistons with 10.0:1 compression and 22mm pins, built for high-boost, power-adder engines. Ultra Series uses JE’s Aligned Grain Flow forging, thermal barrier crown and skirt coatings, lateral gas ports, optimized pin oiling and high-strength wrist pins, and is made entirely in the USA.
JE Pistons Ultra Series Mitsubishi EVO 7-9 4G63 85.5mm Bore 10.0:1 CR Set of 4 Pistons
