Heads were worked over by the Knucklehead God himself {Pete Hill} They are dual plugged and are ported featuring 1 15/16 intakes. Compression is 8:1. Ignition is Power Arc single fire multi spark housed in a Weird Engineering billet stainless steel distributor. Cylinders are ductile iron from Axtell. Engine cases are STD early Pan  style modified by Kyle to use the stock Knucklehead lifter blocks and top end oil return. Exhausts are Paugho shotguns with Super Trapp mufflers.