Knucklehead Rocker Box Seal Kit for 2 Heads

Knucklehead rocker box cover kit is for conversion and will fit 1938-47 late model valve spring cover set on 1936-38 models.
Kit is for use on Knucklehead exhaust rocker shaft. Ten piece kit includes 2 of each part included: seals, steel extension tube and washers, for 2 heads. Washers have 1.425" and 1.495" O.D., Seals have 1.32" and 1.486" O.D., and steel collar measures .87" in length. Rocker box seal kit has enough parts for two rear applications.