KB, M8 114/117 to 120" big bore conv. piston set. STD

Forged Super Duty series for the Milwaukee Eight engine. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ''micro-welding''. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation; final tolerance will be 0.003". The piston creates its own perfect tolerance during run-in; the coating automatically gives the tightest possible & perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 114/117" M8 engines; cylinder must be bored to 4.125" big bore size. Case boring is not required; OEM weight so rebalancing is not required and works with stock 4.500" stroke. 10.9:1 CR. (with 88.6cc head volume). Piston weight: OEM. Piston pin weight 115gr.; offset: 0.025". Piston: +1.9cc/Flat top. Compression height: 1.083". Ring pack: 1.2mm 1.2mm 3.0mm. Bore 4 1/8" / Stroke stock 4.500".