Knucklehead Rear Exhaust Rocker Arm Shaft. USA Made. 17444-39. 36 - 47

Knucklehead Front Intake Rocker Arm Shaft. USA Made. 17435-39. 36 - 47

Harley-Davidson Knucklehead rear intake ROCKER ARM / VALVE TIN lower cover

Knucklehead Rocker arm shaft rear exhaust boxX

KNUCKLEHEAD "NEW REPO" 1936-47 (4) ROCKER ARM BALL STUD #17425-36

Rocker Arm Shaft Parkerized Nuts for Harley Knucklehead 1936-47 EL FL #17447-36

1941 Harley-Davidson Knucklehead Cylinder Head Front Rocker Box, Shaft, Arm

Harley 0136 7831 Knucklehead Rocker Shaft Nuts & Washers 1936-47 Park USA