GMA Engineering Wagner Style Rear Master Cylinder 5/8 Bore for 1958-1979 Harley-Davidson FL FX
The GMA Wagner-style rear master cylinder brings back the responsive, consistent pedal feel that defined early Harley-Davidson rear brake systems. Built to the same geometry as the original, it eliminates the spongy response that worn or damaged stock cylinders develop – restoring the braking character your Harley was designed to have.
Key Features
- Direct Wagner-style replacement for the factory rear master cylinder on compatible 1958-1979 Harley-Davidson models
- CNC-machined billet 6061 aluminum construction for light weight and long service life
- Available in Natural machined, Polished, and Black anodized finishes
- 5/8-inch bore for factory-correct pedal feel and line pressure
- Complete with piston, spring, and boot kit
Technical Specifications
- Bore Size: 5/8 inch
- Material: Billet 6061 aluminum
- Finishes: Natural, Polished, Black
- Includes: Piston, spring, and boot kit
- Made in: USA
Fitment Notes
- Fits 1958-1979 Harley-Davidson FL and FX models equipped with Wagner-style rear master cylinder
- Review the Fitment tab for the complete year and model breakdown
- Verify your OEM master cylinder style before ordering – Kelsey Hayes and Wagner styles are not interchangeable
Nick –
I’m giving the master cylinder 5-stars because I’ve used GMA M/Cyls. in numerous builds. Had to return this particular unit to BDL/GMA for possible flaw in the burnishing process of the bore. I don’t anticipate a problem with GMA correcting the issue.
Steven K. –
GMA always makes quality stuff