Compatible with 4.6L & 5.4L 3V Dish Top Turbo Series Pistons -14cc Dish 3.572'' Bore (+.020'') 3.543'' Stroke 5.933'' Rod Length 1.220'' Comp. Height Moly Coated Skirt 8/pkg. Technical Specs: Compression Ratio: 9.03:1 (51cc) Compression Height: 1.220'' Piston Weight: 370 grams Dish Top: -14cc Pin Size: 22mm dia, 2.500'' long, .150'' wall (106 grams) Spiral Locks: .061'' wide Ring Grooves: 1.5mm Top; 1.5mm Middle; 3mm Bottom Piston Clearance: .003'' measured .850'' from bottom of the oil ring