Mr. Gasket Collector & Header Muffler Gaskets

Mr. Gasket Collector and Header Muffler Gaskets deliver proven, reliable sealing at one of the most thermally demanding joints in any exhaust system — the connection between header collectors and exhaust pipes. Engineered for the full spectrum of performance applications, this product line offers a range of gasket configurations and material grades to suit everything from OEM replacement to all-out competition builds.

Key Features:

• Multiple material tiers — the product line spans compressed fiber laminate for economical, heat-and-tear-resistant sealing; high-temperature steel core with graphite facing for maximum torque retention; dead soft solid copper for conforming to irregular surfaces in extreme-heat and forced-induction applications; and solid aluminum for a leak-proof seal that resists shrinkage and burnout
• Expanded steel core construction (on select grades) provides structural stability and maximum torque retention, eliminating gasket failure under sustained heat and pressure cycling
• Graphite-faced variants offer excellent heat resistance and thermal conductivity, drawing heat away from the sealing surface to extend service life
• Precision die-cut profiles ensure accurate fitment to collector flanges, with select variants trimmable for modified port applications
• Broad configuration coverage across triangular and round bolt patterns, multiple port shapes, and a wide range of inner diameters to accommodate aftermarket and OEM-style header collectors
• Application versatility — street, drag race, oval track, and towing duty cycles are all represented within the line, ensuring the correct material grade is available for the intended use

Since 1964, Mr. Gasket has been the trusted sealing source for performance builders. Founded by drag racer Joe Hrudka, the brand was built on gaskets engineered to withstand the punishing temperatures and pressures of racing. Now part of the Holley Performance family, Mr. Gasket continues its legacy of delivering reliable, application-specific sealing solutions for race cars and street machines alike. Choose the correct variant for your collector flange configuration and intended application for a leak-free, long-lasting seal.