Knucklehead rocker box set features a natutal finish. The front rocker box has the bleeder hole drilled and tapped for cap fitting.

Accepts the early valve cover cup set and features machined snap ring grooves for the appropriate seal kit, available separately. Castings features the 1938-1940 typer markings. The markings may be removed or modified to suit restorer's specification for authenticity. Set is cast with new V-twin MFG exclusive tooling. Rocker boxers are machined to accept original retaining rings. V-Twin #49-1793, Knucklehead rocker box rings, are available separately. *NOTE: Order brass air bleeder valve separately.

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FITS

EL 1936-1937