Description
A properly sized cylinder base is fundamental to engine reliability and performance in Big Twin applications. The COLONY Cylinder Base B Bore delivers precision engineering that ensures proper sealing, reduces leakage, and maintains consistent compression across your engine. If you’re rebuilding or upgrading your powertrain, this domestic-made component gives you the foundation you need to trust your engine under load.
- Fits: 36-84 Big Twin
- Bore Size: B Bore
- MPN: 8600-8
- Made in U.S.A.
- Precision engineered
- Bolt-on installation
- OEM-quality construction









