Ultra-Seal Header Gaskets Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block Square Ports, 2.09 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.
- Manufactured from high-temperature steel core/graphite faced exhaust material
- Expanded steel core provides stability and maximum torque retention to eliminate Gasket failure
- Graphite impregnated facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head
- Conforms to and seals minor surface irregularities
- Can be trimmed if necessary for modified port applications
- For OE replacement, high performance street, drag race and oval track use
Details:
- Collector Gaskets Included: No
- Emission Code: 5
- Gasket Line: Ultra-Seal
- Material: Ultra-seal
- Port Shape: Square
- Port Size: 2.09 x 2.09
- 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 | Biscayne | — |
| 1965–1972 | Chevrolet | Chevelle | SS |
| 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 Pickup | — |
| 1968–1974 | Chevrolet | C30 Pickup | — |
| 1968–1974 | Chevrolet | K20 Pickup | — |
| 1968–1974 | GMC | C35/C3500 Pickup | — |
| 1968–1974 | Chevrolet | K10 Suburban | — |
| 1968–1974 | Chevrolet | C10 Pickup | — |
| 1968–1974 | GMC | C25/C2500 Suburban | — |
| 1968–1974 | GMC | C15/C1500 Pickup | — |
| 1968–1974 | GMC | C15/C1500 Suburban | — |
| 1968–1974 | Chevrolet | K30 Pickup | — |
| 1968–1974 | GMC | K15/K1500 Pickup | — |
| 1968–1974 | Chevrolet | K20 Suburban | — |
| 1968–1974 | Chevrolet | El Camino | Custom |
| 1968–1974 | Chevrolet | C20 Suburban | — |
| 1968–1974 | GMC | K35/K3500 Pickup | — |
| 1968–1974 | GMC | K25/K2500 Suburban | — |
| 1968–1974 | Chevrolet | C10 Suburban | — |
| 1968–1974 | Chevrolet | K10 Pickup | — |
| 1968–1974 | Chevrolet | C20 Pickup | — |
| 1968–1974 | GMC | K25/K2500 Pickup | — |
| 1968–1974 | GMC | K15/K1500 Suburban | — |
| 1968–1974 | Chevrolet | El Camino | SS |
| 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 | Townsman | — |
| 1969–1972 | Chevrolet | Brookwood | — |
| 1969–1972 | Chevrolet | Nova | — |
| 1970–1972 | Chevrolet | Chevelle | — |
| 1970–1974 | Chevrolet | P30 Van | — |
| 1987 | Chevrolet | V20 Suburban | Custom Deluxe |
| 1987 | GMC | R2500 Suburban | High Sierra |
| 1987 | Chevrolet | R20 Suburban | Custom Deluxe |
| 1987–1988 | Chevrolet | V30 | Scottsdale |
| 1987–1988 | Chevrolet | R20 Suburban | Silverado |
| 1987–1988 | Chevrolet | R20 | Silverado |
| 1987–1988 | Chevrolet | R20 | Custom Deluxe |
| 1987–1988 | Chevrolet | V20 Suburban | Silverado |
| 1987–1988 | Chevrolet | V30 | Silverado |
| 1987–1988 | Chevrolet | V30 | Custom Deluxe |
| 1987–1988 | Chevrolet | R30 | Silverado |
| 1987–1989 | GMC | V3500 | High Sierra |
| 1987–1989 | GMC | R3500 | Sierra Classic |
| 1987–1989 | GMC | R2500 Suburban | Sierra Classic |
| 1987–1989 | GMC | V3500 | Sierra Classic |
| 1987–1989 | GMC | R2500 | Sierra Classic |
| 1987–1989 | GMC | R2500 | High Sierra |
| 1987–1989 | GMC | R2500 | — |
| 1987–1990 | GMC | R3500 | — |
| 1987–1990 | GMC | V3500 | — |
| 1987–1990 | GMC | R2500 Suburban | — |
| 1988 | Chevrolet | R30 | Cheyenne |
| 1988 | Chevrolet | R20 | Cheyenne |
| 1988 | Chevrolet | V30 | 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 | Chevrolet | R2500 | Scottsdale |
| 1989–1990 | GMC | G3500 | Rally |
| 1989–1990 | Chevrolet | V3500 | Cheyenne |
| 1989–1990 | Chevrolet | R3500 | Cheyenne |
| 1989–1990 | GMC | G3500 | Vandura |
| 1989–1990 | GMC | G3500 | Vandura Special |
| 1989–1990 | GMC | G3500 | Rally Camper Special |
| 1989–1990 | GMC | G3500 | Rally STX |
