This replacement neck casting is a replica of the Knucklehead 25 degree forgings that were used on Big Twin frames from 1936 to 1940. The casting is composed entirely of ductile iron and manufactured entirely in the United States. These were 3D scanned from an original forging and then recreated with the correct hallmark (DIF) and forging number ( XE-35)

The dimensions and features are identical to the OEM 25 degree necks seen on the original generation of knucklehead and Flathead frames.

Replace, refurbish, or manufacture a replica knucklehead frame using this casting.

Features

• Necks feature the DIF and XE-35 Hallmark numbers in the correct locations.
• These are 100% made and machined in the USA.

Note: Ductile iron must be welded with 100% nickel rod or wire, or Brazed.  Do not try welding with standard wire or rod.  This part is designed to be used by professional welders familiar with ductile iron welding procedures.  Failure to do so could result in extreme failure.