S&S CYCLE 129" Power Package Engine Performance Kit - Gear Drive - Oil Cooled - Highlighted Fins - M8 310-1227

129" Power Package Engine Performance Kit - Gear Drive - Oil Cooled - Highlighted Fins - M8 Transform 107" oil-cooled M8 into 129" , Performance matched 550 cam, Works with stock crankcase, Original engine serial numbers are retained, MLS (multi-layered steel) head gaskets, Big bore cylinders come with matching cam, cam plate and oil pump