Manley Piston Set, PIST-SUPRA 86.5mm/1.180 CD/DISH. Our signature “Platinum Series” pistons feature 2618 alloy forgings, proven cam and barrel skirt profiles, tool steel wrist pins, and moly skirt coatings on select part numbers. Join the ranks of professional engine builders and tuners who rely on Manley pistons for superior performance and durability.2618 Alloy Forgings: We use domestic 2618 alloy forgings, ensuring superior strength and performance. Chrome Moly Wrist Pins: Premium Chrome Moly wrist pins come standard with our Standard Series Pistons. For select SK Us, we offer wrist pin upgrades to 9310 and Turbo Tuff/DLC alloys, providing additional durability. Exacting Ring Lands and Grooves: We adhere to strict standards for piston ring lands and grooves, resulting in enhanced ring seal and more power. Cam and Barrel Profiles: Our pistons boast cam and barrel (skirt) profiles that generate substantial power while being gentle on cylinder walls. Unique Fixturing: Manley’s unique fixturing allows for skirt turning and ring groove machining in a single operation, ensuring ultimate ring groove to skirt squareness. Product Market Sport Compact Bore Diameter 86.50 MM Compression Height 1.180 IN Piston Volume -16.00 CC Weight 322 GR Piston Series Platinum Series Product Type Engine Piston Kit Piston Quantity 6 Engine Stroke 94.00 MM Bore Oversize +0.50 MM Piston Head Type Dish Compression Ratio 10.00: 1 CC Piston Sub-Series Standard Engine Detail – Web 3.0L 2JZ-GTE