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1965-1990 Mr Header Gaskets Chevrolet 396-454 Mark IV Square Ports 1.85 Inch x 1.90 Inch

Item EK-40-878107-1
38 Reviews of Mr. Gasket
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$46.09

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      Product Information

      Features, Description, Q&A

      Features

      • Steel Core With Graphite Facing
      • Graphite Facing Provides Excellent Thermal Conductivity
      • Can Be Trimmed If Necessary For Modified Port Applications
      • Manufactured From High-Temperature Steel Core With Graphite Face
      • Expanded Steel Core Enhances Stability And Torque Retention To Prevent Gasket Failure
      • Graphite Facing Offers Heat Resistance And Transfers Heat Away From The Cylinder Head
      • Seals Minor Surface Irregularities
      • High Recovery Material Maintains Seal Even If Flange Loses Clamp-Load
      • Suitable For Original Equipment Replacement, High Performance Street, Drag Race, And Oval Track Use
      • Port Shape Is Round
      • Port Size Is 1.92 In
      • Thickness Measures .062 In
      • Collector Gaskets Are Not Included
      • Fits Chevrolet Big Block Mark IV Engines Produced Between 1965 And 1990

      Description

      Premium Header Gaskets. The Mr. Gasket 1965-1990 Big Block Header Gaskets are engineered to provide a reliable seal for Chevrolet Big Block Mark IV exhaust ports, helping to prevent leaks and maintain optimal engine performance and efficient exhaust flow. They are suitable for original equipment replacement as well as high-performance street and racing applications.

      Durable Construction. Made with a high-temperature steel core and graphite facing, these gaskets offer excellent heat resistance and thermal conductivity. The expanded steel core adds stability and torque retention, while the graphite facing transfers heat away from the cylinder head and conforms to minor surface irregularities for a secure seal.

      Easy Installation. Installation is generally straightforward, requiring no drilling or major modifications in most cases. The gaskets can be trimmed to fit modified ports if needed, providing versatility for various header setups.

      Warranty Coverage. These gaskets come with a limited 90-day manufacturer’s warranty covering defects in materials and workmanship.

      Application. Designed to fit Chevrolet Big Block Mark IV engines produced from 1965 through 1990, these gaskets are ideal for compatible Chevrolet and GMC vehicles featuring round 1.92-inch ports and .062-inch thickness headers.

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      4.5

      Reviews of Mr. Gasket Classic Exhaust Products (38)

      Questions & Answers

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