OEM reproduction premium quality hydraulic unit. Made in Japan high precision product. Replacement for OEM 17920-53A. Note: The early style hydraulic tappets sets can be purchased as a set (hydraulic unit + tappet body with roller) or as individual parts. When purchasing individual parts correct tolerance cannot be guaranteed, which can influence hydraulic function. Dealers with a larger stock can mix and match hydraulic units and tappet bodies to compose a set that offers excellent bleed-down times. For all others it is advised to go for a complete hydraulic unit and tappet body assembly from the same manufacturer, as S&S or JIMS offer. These are machined with the correct tolerance relative to each other to work correctly right out of the box.
Fits: > 53-65 Panhead; 66-84 Shovelhead (NU)
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