Ultra-Seal Header Gaskets Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block Square Port, 1.85 Inch x 1.90 Inch Mr Gasket
Manufactured from high-temperature steel core/graphite faced exhaust material. Expanded steel core provides stability and maximum torque retention to eliminate Gasket failure.
Graphite facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head. Conforms to and seals minor surface irregularities.
High recovery material allows header or manifold flange to stay sealed if flange loses clamp-load. Can be trimmed if necessary for modified port applications.
For original equipment replacement, high performance street, drag race and oval track use.
- Withstands Intense Exhaust Heat
- Graphite-Impregnated Facing
- Steel Expanded Metal Core
- Superior Tensile Strength
- Resists Deteriorating
- Anti-stick Properties
- Easy Removal For Disassembly
Details:
- Collector Gaskets Included: No
- Emission Code: 5
- Finish: Flat
- Gasket Line: Ultra-Seal
- Material: Ultra-seal
- Port Shape: Square
- Port Size: 1.85 x 1.90
- Warranty: Manufacturer's Limited 90 Day Warranty
CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Vehicle Fitment
| Year | Make | Model | Trim |
|---|---|---|---|
| 1965–1967 | Chevrolet | Impala | SS |
| 1965–1972 | Chevrolet | Chevelle | SS |
| 1965–1972 | Chevrolet | Biscayne | — |
| 1965–1974 | Chevrolet | Corvette | — |
| 1965–1975 | Chevrolet | Bel Air | — |
| 1965–1976 | Chevrolet | Impala | — |
| 1966–1972 | Chevrolet | Caprice | — |
| 1966–1975 | Chevrolet | El Camino | — |
| 1967 | Chevrolet | Camaro | — |
| 1967 | Chevrolet | Camaro | RS |
| 1967–1972 | Chevrolet | Camaro | SS |
| 1968 | Chevrolet | Chevy II | Nova |
| 1968–1974 | GMC | C25/C2500 Suburban | — |
| 1968–1974 | GMC | C35/C3500 Pickup | — |
| 1968–1974 | Chevrolet | C10 Pickup | — |
| 1968–1974 | Chevrolet | C30 Pickup | — |
| 1968–1974 | GMC | C25/C2500 Pickup | — |
| 1968–1974 | Chevrolet | K10 Suburban | — |
| 1968–1974 | GMC | C15/C1500 Pickup | — |
| 1968–1974 | Chevrolet | El Camino | SS |
| 1968–1974 | GMC | C15/C1500 Suburban | — |
| 1968–1974 | Chevrolet | K20 Pickup | — |
| 1968–1974 | GMC | K25/K2500 Suburban | — |
| 1968–1974 | Chevrolet | K20 Suburban | — |
| 1968–1974 | Chevrolet | El Camino | Custom |
| 1968–1974 | Chevrolet | C20 Suburban | — |
| 1968–1974 | GMC | K35/K3500 Pickup | — |
| 1968–1974 | Chevrolet | K30 Pickup | — |
| 1968–1974 | Chevrolet | C20 Pickup | — |
| 1968–1974 | Chevrolet | C10 Suburban | — |
| 1968–1974 | GMC | K25/K2500 Pickup | — |
| 1968–1974 | GMC | K15/K1500 Suburban | — |
| 1968–1974 | Chevrolet | K10 Pickup | — |
| 1968–1974 | GMC | K15/K1500 Pickup | — |
| 1969 | Chevrolet | Camaro | RS |
| 1969 | Chevrolet | Chevelle | 300 Deluxe |
| 1969 | Chevrolet | Camaro | — |
| 1969–1970 | Chevrolet | Estate | — |
| 1969–1972 | Chevrolet | Chevelle | Greenbrier |
| 1969–1972 | Chevrolet | Chevelle | Malibu |
| 1969–1972 | Chevrolet | Chevelle | Nomad |
| 1969–1972 | Chevrolet | Kingswood | Estate |
| 1969–1972 | Chevrolet | Chevelle | Concours Estate |
| 1969–1972 | Chevrolet | Kingswood | — |
| 1969–1972 | Chevrolet | Chevelle | Concours |
| 1969–1972 | Chevrolet | Brookwood | — |
| 1969–1972 | Chevrolet | Townsman | — |
| 1969–1972 | Chevrolet | Nova | — |
| 1970–1971 | Chevrolet | P20 Van | — |
| 1970–1971 | GMC | P35/P3500 Van | — |
| 1987 | Chevrolet | R20 Suburban | Custom Deluxe |
| 1987 | GMC | R2500 Suburban | High Sierra |
| 1987 | Chevrolet | V20 Suburban | Custom Deluxe |
| 1987–1988 | Chevrolet | V30 | Scottsdale |
| 1987–1988 | Chevrolet | R20 Suburban | Silverado |
| 1987–1988 | Chevrolet | V20 Suburban | Silverado |
| 1987–1988 | Chevrolet | R30 | Custom Deluxe |
| 1987–1988 | Chevrolet | R20 | Silverado |
| 1987–1988 | Chevrolet | R20 | Custom Deluxe |
| 1987–1988 | Chevrolet | V30 | Silverado |
| 1987–1988 | Chevrolet | R30 | Silverado |
| 1987–1989 | GMC | V3500 | High Sierra |
| 1987–1989 | GMC | R3500 | Sierra Classic |
| 1987–1989 | GMC | R2500 | Sierra Classic |
| 1987–1989 | GMC | R2500 Suburban | Sierra Classic |
| 1987–1989 | GMC | V3500 | Sierra Classic |
| 1987–1989 | GMC | R2500 | High Sierra |
| 1987–1989 | GMC | R2500 | — |
| 1987–1990 | GMC | V3500 | — |
| 1987–1990 | GMC | R3500 | — |
| 1987–1990 | GMC | R2500 Suburban | — |
| 1988 | Chevrolet | R30 | Cheyenne |
| 1988 | Chevrolet | V30 | Cheyenne |
| 1988 | Chevrolet | R20 | Cheyenne |
| 1988–1990 | Chevrolet | C3500 | Silverado |
| 1988–1990 | Chevrolet | G30 | Sportvan |
| 1988–1990 | Chevrolet | K3500 | Silverado |
| 1988–1990 | Chevrolet | G30 | Chevy Van |
| 1988–1990 | GMC | K3500 | Sierra SLX |
| 1988–1990 | Chevrolet | G30 | Hi-Cube |
| 1988–1990 | GMC | G3500 | Magnavan |
| 1988–1990 | Chevrolet | C3500 | Cheyenne |
| 1988–1990 | Chevrolet | K3500 | Scottsdale |
| 1988–1990 | Chevrolet | C3500 | Scottsdale |
| 1988–1990 | Chevrolet | K3500 | Cheyenne |
| 1988–1990 | GMC | C3500 | Sierra SLX |
| 1988–1990 | GMC | K3500 | Sierra |
| 1988–1990 | GMC | C3500 | Sierra |
| 1988–1990 | Chevrolet | G30 | Beauville |
| 1988–1990 | GMC | K3500 | Sierra SLE |
| 1988–1990 | GMC | C3500 | Sierra SLE |
| 1989 | Chevrolet | R2500 | Cheyenne |
| 1989–1990 | GMC | G3500 | Rally |
| 1989–1990 | Chevrolet | R3500 | Cheyenne |
| 1989–1990 | Chevrolet | V3500 | Cheyenne |
| 1989–1990 | GMC | G3500 | Vandura |
| 1989–1990 | GMC | G3500 | Vandura Special |
| 1989–1990 | GMC | G3500 | Rally Camper Special |
| 1989–1990 | Chevrolet | R3500 | Scottsdale |
| 1989–1990 | GMC | G3500 | Rally STX |
