Description
A properly sealed cylinder base is non-negotiable for reliable horsepower and engine longevity. The COMETIC C9555 delivers a precision gasket engineered to withstand the combustion pressures and thermal cycling that stock gaskets simply can’t handle. Whether you’re running a stock rebuild or a high-output build, this gasket ensures a consistent, leak-free seal that protects your bottom end.
- Fits EVO and XL Sportster models
- 3-5/8″ bore diameter
- Spiral-wound core construction
- Heat-resistant composite facing
- CNC-machined for precision tolerances
- Bolt-on installation
- OEM-comparable performance
- Reusable design
- Superior sealing consistency









