KB PERFORMANCE Piston Kit 124" +.005" M8

Updates stock 107", 114” or 117” motor to 124” or 128” when using 4.250” big bore cylinders. Valve pockets are designed to accept up to +4.00 mm 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 .9270” 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