Cometic Top End Gasket Kit C3429-EST For Motorsports

Engineered for high‑performance KTM workflows, the Cometic Top End Gasket Kit C3429-EST delivers a reliable, race‑grade seal for the KTM 350 SX‑F with a 90mm bore. The EST (Extreme Sealing Technology) design pairs embossed stainless steel head, base, and rocker gaskets with a proprietary rubber coating to draw heat away from the combustion chamber and dissipate it evenly across the gasket surface, reducing hot spots and preventing gasket failure under demanding conditions.

This top‑end kit is a complete rebuild package from the cylinder base upward. It includes all necessary gaskets, seals, and O‑rings to restore the sealing system around the entire top end, streamlining installation and minimizing downtime. Built for durability, the gaskets are designed to resist high temperatures and pressure, helping maintain consistent compression and preventing leaks during prolonged, high‑RPM sessions.

Key benefits you’ll notice with the C3429-EST kit include a more consistent seal under heat cycling, improved heat management of the combustion face, and a robust, long‑lasting fit that stands up to persistent sport and off‑road use. It’s a specialized solution for professionals and DIY enthusiasts who demand dependable performance, precision fit, and straightforward top‑end restoration.

• Embossed stainless steel head, base, and rocker gaskets with a rubber coating
• 90mm bore compatibility for KTM 350 SX‑F applications
• Includes gaskets, seals, and O‑rings needed from cylinder base upward
• Designed for high‑performance engines to maintain compression and prevent leaks

EST (Extreme Sealing Technology) gasket kits include embossed stainless steel head, base and rocker gaskets covered with a proprietary rubber material

Head gasket material allows heat to be drawn away from the combustion ring and dissipated evenly across the gasket surface to eliminate hot spots and gasket failure

Sets contain all the necessary gaskets, seals and O-rings to rebuild the top end from the cylinder base upward

The Cometic Top End Gasket Kit C3429-EST is designed to provide a reliable seal for your engine's top end components, ensuring optimal performance and durability. Crafted with precision, this gasket kit is suitable for various high-performance applications where a dependable seal is essential for maintaining compression and preventing leaks. The kit includes all necessary gaskets to facilitate a comprehensive rebuild or repair, simplifying installation and reducing downtime. Engineered with quality materials, the Cometic C3429-EST gasket kit offers excellent heat resistance and long-lasting performance under demanding conditions. Whether you're restoring an engine or enhancing its performance, this gasket kit is an ideal choice for professional mechanics and DIY enthusiasts alike.

Features:

• Designed for high-performance engine applications to ensure a reliable seal

• Includes all necessary gaskets for a comprehensive top end rebuild

• Constructed with durable materials for excellent heat and pressure resistance