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 BMW M54B30 Piston Set, 84.00 mm Bore, 30.32 mm Compression Height, 0.8661 in. Pin Diameter, European, Set of 6.. Piston Set, BMW, M54B30, 84.00 mm Bore, European, Set of 6. Wiseco BMW M54B30 -7.3cc Dish 1.1937in x 3.307in. Wiseco -BMW M54B30 - Set. Engine Piston Set. BMW M54B30. Piston Set

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