Kooks Headers Header Flanges - Performance Exhaust Cylinder Head Flanges

Kooks Header Flanges are precision-engineered exhaust components designed to provide reliable, leak-free connections between custom headers and cylinder heads. Whether you're fabricating a performance exhaust system from scratch or replacing a worn flange, this comprehensive product line covers a wide range of engine families and performance applications — from street builds to full-competition race setups.

Key Features:

• Premium Material Construction — Available in T304 aircraft-grade stainless steel or steel, providing outstanding corrosion resistance and the ability to withstand extreme exhaust temperatures
• Precision Machined to Tight Tolerances — Manufactured for a proper seal and accurate fitment to cylinder head ports, eliminating exhaust leaks under high-demand conditions
• Wide Selection of Configurations — Available across multiple port shapes, thicknesses, and bolt patterns to suit a broad range of engine families and custom header builds
• Optimized for Exhaust Flow — Engineered to support smooth exhaust gas scavenging and help maximize power output throughout the RPM range
• Dyno and Race Tested — Every Kooks product is validated for maximum performance under both real-world street and competition conditions
• Made in the USA — Proudly manufactured domestically by a family-owned company with over 60 years of performance exhaust expertise
• Limited Lifetime Warranty — Backed by Kooks' limited lifetime warranty to the original purchaser

About Kooks Headers & Exhaust

Since 1962, Kooks has been a trusted name among professional racers competing in NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, and SCCA events. That same race-proven quality and meticulous attention to detail goes into every header flange in this lineup, making them the ideal choice for custom fabricators, engine builders, and performance enthusiasts who demand the best. Select the correct variant for your application using the options above.