Manley, valve key set (8) - 36-47 Knucklehead; 48-65 Panhead; 66-84 Shovelhead (NU) 978416 - Smooth (plain) housing -

- Smooth (plain) housing - Lens diameter is 27mm - ECE approved lens - Die-cast aluminum housing - With 12V 21W halogen bulb Note: See 940803 for replacement lens

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Fits most 14mm threaded spark plugs

OEM replacement reference 27090-89

Scuffing and wear are reduced to a minimum

Manley, valve key set (8) - 36-47 Knucklehead; 48-65 Panhead; 66-84 Shovelhead (NU) 978416 - Smooth (plain) housing -Stock style replacement. Heat treated, black oxided and 100% machined from a special chromoly material. Each valve keeper is designed to work with stock, Manley and most aftermarket top collars. Includes 4 pairs of valve keepers, to service one engine.