Cometic C9240 Cylinder Base Gasket .020" High-Density Fiber

The Cometic C9240 is a premium cylinder base gasket engineered specifically for Harley-Davidson Knucklehead Big Twin motorcycles from 1936 to 1947. This gasket features high-density fiber construction with a precision .020-inch thickness, providing reliable sealing between the cylinder and crankcase.

Key Features:

• High-density fiber material for superior compression resistance and durability
• .020-inch (0.020") gasket thickness for proper compression ratio and deck height
• Direct replacement for Harley-Davidson OEM part number 16774-21
• Package includes 2 gaskets (one pair) for complete cylinder base sealing
• Manufactured in the USA with quality materials
• Designed for vintage Knucklehead Big Twin applications 1936-1947

Cometic Gasket is a leading manufacturer of high-performance gaskets and engine sealing solutions, utilizing advanced materials and manufacturing processes to deliver superior sealing performance. Each gasket is engineered for its specific application to ensure optimal fit and reliability in demanding vintage motorcycle rebuilds.