Exact duplicates of the large rocker shaft nuts. They feature the low profile design of the original counterparts.

Hard to find rocker arms and shafts remanufactured by S&S. These high quality rocker components are the same as S&S uses in the KN- Series engines, and will fit stock Knucklehead engines as well since they feature the the stock 1:1 rocker ratio. Each complete set comprises four rocker arms, rocker shafts, washers, spacers and special O-ring seals. The shafts are also available separately but are not compatible with stock rocker arms.

Exact reproductions of the stock Knucklehead oil feed lines which connect the gear cover with the rocker housings.

Precise reproductions of stock Knucklehead cylinder heads, cast from aluminum. Besides the significant weight savings of approx. 4 kg per head they dissipate heat much better than their cast iron counterparts. They are manufactured after 1940-1947 heads with large intake ports. The valve seats are pre-installed, but unmachined and sized for stock intake and exhaust valves. They are hardened for the use of today’s unleaded fuels. Steel inserts for the head bolts feature factory threads. The heads show all the small details like cast-in number tags and foundry markings, so they make for excellent stock replacements or for building a performance engine with factory look when you camouflage them with black paint.