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Header Gaskets - MLS - 396-454 Chevrolet Big Block Mark IV 1965-90

Mr. Gasket, Multi-Layered Steel Material, Square Ports, 1.85" x 1.90"

PART# 4816G

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$21.40   Suggested Retail
$19.26   Your Price
Estimated shipping date: 05/03/2019
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• Multi-Layered Steel (MLS) header gaskets are designed for extreme cylinder pressures produced by high horsepower–high compression turbo-charged, supercharged and nitrous oxide injected engines. • Manufactured from three stainless steel layers, they resist corrosion, will not burn through or push out and maintain maximum fastener torque retention. • Stress formed inner and outer layer embossments act like springs that rebound under exhaust flange clamp load, creating force to seal extreme exhaust pressures. Total gasket thickness .075 ̋. • Will not deteriorate from scrubbing action caused by different expansion rates in aluminum and steel materials.


BrandMr. Gasket
Collector Gaskets IncludedNo
Emission Code3
EngineChevrolet Big Block Mark IV
Gasket LineMLS
Port ShapeSquare
Port Size1.85" x 1.90"
Product TypeHeader Gaskets
Type of ComponentExhaust Gaskets
WarrantyLimited 90 Day Warranty
Part Number4816G


This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.

Warranty Information

Limited 90 Day Warranty: See Details


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      *Free Shipping & Handling only offered to the contiguous US on orders over $100.

      Some parts are not legal for use in California or other states with similar regulations.