KB931C010 Performance, 1200cc B.T. forged piston kit. +.010"

When rebuilding a classic 1941 to 1978 1200cc Knucklehead, Panhead, or Shovelhead, this KB Performance forged piston kit offers a significant durability upgrade. These +.010 inch oversize pistons are machined from 4032 aluminum alloy, providing a robust 8.5:1 compression ratio with a 112cc head. The forging process ensures superior molecular integrity, allowing the piston to handle pre-ignition stresses better than cast alternatives. Sold as a set, the kit includes offset wrist pins, retaining rings, and piston rings. Because of the specific alloy used, these pistons require approximately .001 inch additional piston-to-wall clearance. It is essential to follow the installation instructions regarding the front and rear orientation of the offset pins to ensure the engine runs smoothly and reliably for years to come.