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".