Description
The COMETIC Derby Cover O-Ring is engineered to prevent oil leakage and maintain proper crankcase sealing on your Big Twin—critical for consistent engine performance and longevity. Built from premium fuel-resistant elastomers, this O-ring resists the thermal cycling and chemical exposure that cause inferior seals to fail prematurely. As a direct replacement for Harley-Davidson Big Twin applications, it’s a straightforward bolt-on upgrade that eliminates weeping and protects your engine’s internal components.
- MPN: C9662
- Application: Harley Big Twin
- Type: Derby cover O-ring
- Material: Fuel-resistant elastomer
- Resistant to creep, cracking, brittleness
- Made in the USA
- Installation: Bolt-on replacement
- Long-term reliability rated
