This adapter was used by the factory 1938-1940 and is required for all early type rockerboxes on the rear exhaust position to seal properly against the valve spring and rocker arm covers.
- for Rocker housings
- fits Knucklehead 1938-1940
- steel, parkerized
- replaces OEM 177-38, and 17570-38
Paughco Rocker Arm Cover Caps
Cups and Covers for Valve Springs/Rocker Arms
Have any questions?
Our service team will be glad to help out: Mondays - Thursdays 09:00-16:00 CET, Fridays 08:00-16:00 CET, Phone: +49 / 931 250 61 16, eMail: firstname.lastname@example.org