Designed for Power: Every feature on Ultra Series Pistons are optimized to perform high-horsepower racing enginesAligned Grain Flow Technology: Exclusively available on JE Ultra Series, this proprietary, in-house forging process maximizes tensile strength to withstand the stresses of high-performance engine environmentsSkirt Coating: Reduces friction and wear on piston skirts and cylinder walls while simultaneously reducing operating noise, especially on cold startThermal Barrier Crown Coating: This ceramic-based coating reflects heat into the combustion chamber, therefore reducing piston crown temperatures and improving exhaust gas scavengingHigh-Strength Wrist Pins: Premium thick-wall wrist pins are manufactured by Trend Performance in the USA and are designed for the demands of high-performance/power-adder buildsLateral Gas Ports: Help maintain power-producing ring seal at the top compression ring, even in high RPM and high boost situationsOptimized Pin Oiling: Enhanced pin oiling features keep pin, pin bores, and small-end lubricated for reduced heat, friction, and wearMade 100% in the USA. Ultra Series forged pistons from JE are the industry?s strongest, most fully featured pistons available off the shelf. Offered for a wide range of import and sport compact applications from 2JZ to 4G63 and Audi to BMW, 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 custom level features including thermal barrier crown coating, skirt coating, gas ports, and more, Ultra Series are the ideal pistons for your high-boost build. As with all JE Pistons products, Ultra Series pistons are made 100% in the USA.. JE Ultra, Mitsubishi, 4G63 - 01-07 Evolution VII-IX - 22mm Pin, 3.346 in. Bore, 10.00:1, Inverted Dome/Dish, 4 Cyl. Piston Kit. JE Pistons Ultra Series Mitsubishi EVO 7-9 4G63 85mm Bore 10.0:1 CR Set of 4 Pistons. Piston Set, 2618, Inv Dome/Dish, 3.346 Bore, 1.367 CD, 0.866 Pin, Set of 4.. Mitsubishi 4G63 EVO VII-IX 01-07. Engine Piston Kit

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