Cometic Gasket Top End Gasket Kit - 94mm Bore C7979 All top-end gasket kits include everything needed to rebuild your top end. Cometic Gasket offers the latest in gasket technology. Gasket materials, design and manufacturing processes are constantly improving to match the high level of performance for todays powersports engines. When purchasing a Cometic Top End gasket kit, you can rest assured that every component will be the best solution for your application.