Mr. Gasket - 5911 Ultra-Seal Header Gaskets Bb Chev

$ 27.00

Score By Feature

Based on 28 ratings

Suction power

9.70

Easy to use

9.80

Easy to fold

9.90

Easy to clean

9.90

Sturdiness

9.60

Durability

9.80

OveReview Final Score

How Our Score Is Calculated

Product Description

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Made of a high-temperature steel core with a graphite-faced exhaust material.

Gasket failure is avoided thanks to the expanded steel core's stability and maximum torque retention.

Heat is transferred away from the cylinder head thanks to the graphite impregnated facing, which has excellent heat resistance and thermal conductivity.

Minor surface irregularities are conformed to and sealed.

If necessary, it can be trimmed to fit a different port application.

Vehicle specific type of fit

Selected User Reviews For Mr. Gasket - 5911 Ultra-Seal Header Gaskets Bb Chev

The 5911 gasket is the only gasket that will fit basic round headers on square port big block check heads (1974 454 in my case)

5/5

The port dimensions were the deciding factor in choosing between these and copper/aluminum gaskets. The 5911 gasket is the single best fit for adapting the two shapes when using basic round headers on square port big block check heads (1974 454 in my case). They sealed beautifully, but don't hold your breath for a re-seal. Use them because if you remove the header and try to re-compress them, they usually leak. Take advantage of them. You can also use permatex ultra copper silicone to cheat with these.