Kolben für 383 Big Block, geschmiedet, Flat Top, +0,030in., einzeln Pistons, Forged, Flat, 4.280 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Mopar, Each Schmiedekolben Verdichtung bei open chamber cylinderhead ~ 8.94:1 with 88cc headvolume Verdichtung bei closed chamber cylinderhead ~ 9.77:1 with 78cc heah volume Brand: Speed Pro Part Type: Pistons Product Line: Speed-Pro Forged Pistons Bore (in): 4.280 in. Bore (mm): 108.712mm Piston Style: Flat top, with no valve reliefs Piston Material: Forged aluminum Compression Distance (in): 1.920 in. Wrist Pin Style: Press-fit Pin Diameter (in): 1.094 in. Piston Ring Thickness: 5/64 in. x 5/64 in. x 3/16 in. Notes: Duroshield skirt coated piston. The pistons have to be installed with the arrow facingto the front! (towards the Water Radiator) These Speed-Pro forged pistons are made from extruded VMS-75 aluminum alloy that's forged under 3,000 tons of pressure to in.near-netin. shape. After that, they're machined to their final configuration. These pistons offer excellent strength and durability and are capable of taking the punishment that's dished out on the street and in competition. They're available for a wide variety of applications, including OE replacements and all-out racing engines.