Description
Rocker box gaskets experience constant thermal cycling and oil exposure, making them prone to failure and costly leaks if not properly sealed. The COMETIC Rocker Gasket EST XL C9764 delivers a complete, OEM-quality gasket kit engineered to eliminate weeping and maintain consistent rocker box pressure across extended service intervals. This U.S.-manufactured solution gives you confidence that your top-end assembly stays sealed, whether you’re running street hours or track days.
- Manufacturer: COMETIC Gasket
- MPN: C9764
- Application: XL Rocker boxes
- Fitment: EST-specific
- Material: Premium elastomer compounds
- Kit Contents: Gaskets, seals, O-rings, bolt seals
- Coverage: Both rocker boxes
- Installation: Bolt-on replacement
- Origin: Made in USA
- Service Life: Extended leak-free operation






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