Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strengthArmorGlide? Skirt Coating: seizure resistant, friction reduction, and quieter operationFully machined crown featuresPrecision ring grooves, anti-detonation groove, and additional ring seal improving featuresForced pin oilingDesigned and built to withstand heavy to severe duty performance applications. Professional Series forged racing pistons from Wiseco are no-expense-spared pistons designed for the serious racers and builders. Packed full of custom-level performance and durability features and provided with premium rings, Professional Series pistons are designed and built for use in heavy to severe duty race builds. Remove your limits with Wiseco?s Professional Series.. Wiseco Mitsubishi 4G63T Piston Set, 85.00 mm Bore, 34.87 mm Compression Height, 0.866 in. Pin Diameter, Sport Compact, Set of 4.. Wiseco Mitsu Evo 4-9 4G63 Asymmetric Skirt Bore 85.00mm - Size STD - CR 9.5 Piston Set. Piston Set, Mitsubishi, 4G63T, 85.00 mm Bore, Sport Compact, Set of 4. Mitsubishi EVO 1996-2007. Engine Piston Set. Piston Set

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