Cometic C9102 EST Top End Gasket Kit for Harley-Davidson Ironhead Sportster 900

The Cometic C9102 EST (Extreme Sealing Technology) Top End Gasket Kit is engineered specifically for 1957-1971 Harley-Davidson Ironhead Sportster 900cc engines with a 3.250" bore. This comprehensive rebuild kit contains all necessary gaskets, seals, and O-rings required to rebuild the top end from the cylinder base upward.

Key Features:

• EST technology features embossed stainless steel head, base, and rocker gaskets covered with proprietary rubber material
• .032" copper cylinder head gaskets for superior heat dissipation
• .031" base gaskets included
• Advanced head gasket material draws heat away from combustion ring and dissipates it evenly to eliminate hot spots and gasket failure
• Reinforced gasket compounds including armor-clad, graphite, and galvanized steel for sealing irregular surfaces
• Made in the USA with American-sourced materials

This kit replaces Harley-Davidson OEM part number 17030-57 and is compatible with XL, XLH, XLCH, XLC, XLR, XLRTT, and XR models from the Ironhead era. Cometic's precision-engineered gaskets provide reliable sealing performance for vintage Sportster rebuilds and restorations.