Produced from modern 2618 lightweight alloy forgings for extreme duty, each piston features supported pin bosses to withstand the extreme conditions found in engines operating with high cylinder pressures. The layout of the piston has also been optimized with weight reduction in mind and reduced skirt profiles to minimize friction. The design also includes gas accumulator grooves developed during extensive testing and tailored for the EcoBoost engine. Extreme duty 22.5mm internally tapered, short wrist pins are used to reduce pin flex and weight. As an added feature, Mahle’s phosphate dry lubricant coating is used on the entire piston to reduce micro-welding and pin galling. Additionally, Mahle’s Grafal skirt coating is used on the piston skirt to reduce cylinder wall friction reduction. Hard anodized top ring grooves have been incorporated for increased durability and strength to withstand the high cylinder pressures of high boost engines.
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