Super-Duty 128in. Big Bore Piston Kit - 4.250in.

Super-Duty 128in. Big Bore Piston Kit - 4.250in.

Manufacturer: KB Performance

SKU: KB596LCA.005

Updates stock 107in., 114in. or 117in. motor to 124in. or 128in. when using 4.250in. big bore cylinders.Valve pockets are designed to accept up to +4mm oversized intake and exhaust valves.Type 3 hard-anodized crown offers corrosion resistance for alcohol-added fuels.Type 3 hard-anodized top ring groove eliminates micro-welding of ring to the groove and gives a hard-flat surface for ring to rotate on.OE-style round wire locks are easily installed.Heavy-duty wrist pins with true .9270in. diameter to fit rods correctly.Line2Line AST skirt coating starts out with a near-zero wall clearance and through the break-in period hones the cylinders to produce the correct oil wedge, keeping the piston square to the cylinder for best ring seal and quiet operation.Kit includes pistons, rings, pins and locks.NOTE: Requires the separate purchase of 4.250in. bore cylinders PART #0931-0823. Compression ratio: 11.7:1