HARLEY Knucklehead Rocker Box Seal Kit for 2 Heads Fits 1936-1940 EL, rear only

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 inch and 1.495 inch O.D. Seals have 1.32 inch and 1.486 inch O.D. and steel collar measures .87 inch in length. Rocker box seal kit has enough parts for two rear applications. FITS HARLEY: 1936-1940 EL, rear only