5910 Mr. Gasket Ultra-Seal Header Gaskets

Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block. Square Port, 1.85 Inch x 1.90 Inch;

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.;

General Policies

Payment Method

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Warranty & Return Policy

Holley Performance Products warrants new products to be free from defects in material and workmanship for a period of 90 days from date of purchase.

Holley Performance Products Limited Warranty specifically does not apply to products, which have been (a) modified or altered in any way; (b) subjected to adverse conditions, such as misuse, neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion, or faulty repair; or (c) used in other than those applications recommended by Holley Performance Products. Holley Performance Products also does not warrant, and disclaims all liability for products used in racing activities and/or applications other than those specifically recommended in the current brand catalog.

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We ship all US orders via United Parcel Service (UPS Ground)
A signature is required on all UPS orders over $750
Tracking information will be sent via email after your package ships (you must supply a valid email address during checkout)
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We do not ship to APO/FPO or US Post Office Box addresses
We ship internationally thru United States Postal Service (USPS) Express Mail International; allow extra time for international shipments
We can not ship as a "GIFT" or ship anything internationally with changes to the invoice

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