Multi-Layered Steel (MLS) exhaust and header collector gaskets are designed for extreme cylinder pressures produced by high horsepower-high compression turbo-charged, supercharged, and nitrous oxide engines. Manufactured from three stainless steel layers, resists corrosion, will not burn through or push out and maintains 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 excessive exhaust pressure produced from cylinder heads. Withstands different combinations of cylinder head (aluminum) and exhaust header or manifold (steel) materials, will not deteriorate from scrubbing action caused by different expansion rates in aluminum and steel.
Features:
- Designed To Provide Excellent Sealing And Durability
- Heat Resistant
- Reusable
- Precision Die Cut
- Limited Warranty
Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
About Mr. Gasket
Using his own '57 Chevy as a rolling test bed, drag racer Joe Hrudka launched the most famous gasket company in the world more than half a century ago (started in 1964). Building a name for himself and his company competing at Cleveland-area tracks Norwalk and Dragway 42, Hrudka quickly established Mr. Gasket as the go-to gasket source for racers with a line of head gaskets, exhaust gaskets, oil pan gaskets, and fasteners that sealed perfectly every time and withstood the punishing temperatures and pressures of racing. Now an important part of Holley Performance, Mr. Gasket continues to expand application coverage with more and more new products for race cars and muscle cars alike. Beyond the gaskets that made the Mr. Gasket brand what it is today is an endless variety of high-performance parts, including carburetor and fuel system components, chrome-plated accessories to dress up your engine bay, fuel additives, shifter accessories, cooling-system accessories, specialty tools, and a wide array of heavy-duty suspension and driveline components.

Vehicle Fitment:
The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make |
Model |
Years |
Engine |
Fitment Notes |
Chevrolet |
Corvette |
1966 |
7.0L / 427 / V8 |
Square Port Shape; [Available While Supplies Last] |
Chevrolet |
Corvette |
1967 |
7.0L / 427 / V8 |
Square Port Shape; [Available While Supplies Last] |
Chevrolet |
Corvette |
1968 |
7.0L / 427 / V8 |
Square Port Shape; [Available While Supplies Last] |
Chevrolet |
Corvette |
1969 |
7.0L / 427 / V8 |
Square Port Shape; [Available While Supplies Last] |
Chevrolet |
Corvette |
1970 |
7.4L / 454 / V8 |
Square Port Shape; [Available While Supplies Last] |
Chevrolet |
Corvette |
1971 |
7.4L / 454 / V8 |
Square Port Shape; [Available While Supplies Last] |
Chevrolet |
Corvette |
1972 |
7.4L / 454 / V8 |
Square Port Shape; [Available While Supplies Last] |
Chevrolet |
Corvette |
1973 |
7.4L / 454 / V8 |
Square Port Shape; [Available While Supplies Last] |
Chevrolet |
Corvette |
1974 |
7.4L / 454 / V8 |
Square Port Shape; [Available While Supplies Last] |