Super-Duty Big Bore Piston Kit

Piston Kit - 4.250" +0.005" - 11.8:1 CR - 124" Big Bore - 107" M8

• 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 0.9270” 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
• Requires 4.250" bore cylinder sold separately.