Kooks Headers Exhaust Header Gasket

Kooks Headers Exhaust Header Gaskets: The Right Seal for Race-Proven Headers

When you invest in a set of Kooks Headers long-tube or shorty headers, the last thing you want is a compromised seal at the cylinder head. A blown or improperly fitted header gasket bleeds exhaust pressure, robs power, and can allow toxic gases to enter the engine bay. That's why Kooks — a brand with more than six decades of exhaust engineering experience — extends its attention to detail all the way down to the gaskets that hold the system together.

Exhaust header gaskets from Kooks are engineered as true companions to their header lineup, not afterthoughts. Rather than sourcing generic sealing material, Kooks develops gaskets that are dimensionally matched to their specific header flanges and the cylinder heads they're designed to mate with. The result is a leak-free, performance-preserving seal that's as carefully thought out as the headers themselves.

Material Options Built for High Heat and High Horsepower

Kooks offers several gasket constructions, each suited to different applications and build goals:

• Multi-Layer Stainless Steel (MLS) Gaskets — Kooks' MLS header gaskets, such as those designed for GM LT-based Gen V small block engines, use multiple layers of stainless steel to create a resilient, recoverable seal that stands up to extreme heat cycling and high cylinder pressures. These are often the preferred choice for boosted or high-compression builds.
• Multi-Layer Aluminum (MLA) Gaskets — Designed for applications like Small Block Ford heads with a 3-inch inline bolt pattern, Kooks' MLA gaskets provide excellent conformability to aftermarket cylinder head surfaces, accommodating head port shapes from brands like Dart, World Products, and Air Flow Research.
• Carbon Composite Gaskets — Kooks also offers carbon composite header gaskets, a material that is extremely heat-resistant and represents a significant step forward from older fiber-based gasket technology.

Platform-Specific Engineering

One of the hallmarks of Kooks' approach across every product category is precise vehicle fitment, and their gaskets are no exception. Whether you're building a Ford 5.0L Coyote, a 4.6L/5.4L modular motor, or a GM LS/LT platform, Kooks engineers gaskets to the specific port geometry and bolt pattern of that application. This means no trimming, no improvising — just a clean installation that aligns with the header flanges exactly as intended.

It's also worth noting that Kooks includes gaskets with most of their header kits, and these individual gaskets are offered separately as replacements or upgrades — ideal for builders who want to refresh a seal during a reinstall or upgrade to a more robust MLS or composite design without purchasing an entirely new header set.

Why Trust Kooks for Your Gaskets?

Kooks has been manufacturing performance exhaust components in the USA since 1962, earning the trust of competitors across NHRA, NMRA, NASCAR, SCCA, and more. Their gaskets carry the same philosophy: hand-crafted attention to detail, quality materials, and fitment you can count on. When your header flanges are sealed properly, every bit of exhaust energy flows where it should — through the pipes and out the back, translating directly into the power numbers your build is capable of.