Wiseco Ford 2.0L Piston Set, 92.00 mm Bore, 40.80 mm Compression Height, 0.945 in. Pin Diameter, European, Set of 4. 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. Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength Armor Glide® Skirt Coating: seizure resistant, friction reduction, and quieter operation Fully machined crown features Precision ring grooves, anti-detonation groove, and additional ring seal improving features Forced pin oiling Designed and built to withstand heavy to severe duty performance applications Specifications Product Series Professional Bore Diameter 92.00 MM Compression Height 40.80 MM Piston Volume -20.20 CC Piston Material 2618 Skirt Coating Yes Forging Type Full Round Piston Quantity 4 Ring Set Included Yes Top Compression Ring Thickness 1.0 MM Second Compression Ring Thickness 1.2 MM Oil Ring Thickness 2.8 MM Wrist Pin Included Yes Wrist Pin Material 5115 Wrist Pin Outer Diameter 0.945 IN These images are representative, actual product images may differ.