KB Performance Super-Duty Big Bore M-Eight Piston Kit, +0.005 Kit - Fits 17 & Newer M-Eight

• Updates stock 107" motor to 124" when using 4.250" big bore kits
• 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 .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 11.4:1 CR pistons, rings, pins and locks

NOTE: Requires the separate purchase of 4.250" bore cylinders - Part #0931-0823

Fitments