Description
The COLONY Cylinder Base XLR Type 57-84 XL delivers the precision engineering required for reliable big-twin performance in classic Harley-Davidson applications. This U.S.-manufactured component ensures proper cylinder sealing and alignment, critical for maintaining compression integrity and preventing costly leaks. Built to OEM specifications, it’s the foundation your engine rebuild demands.
- Fitment: Harley-Davidson XL 1957-1984
- Type: Cylinder base
- Material: High-grade cast
- Manufacturing: U.S.A. made
- MPN: 7623-8
- Installation: Bolt-on replacement
- Application: Big-twin engines









