Base Gasket 1.75 in. Bore Size. 3125 in. Thickness Fits Holley 4160/4150 and four barrel TBI flange pattern.3125" thick open center base gasket for Holley square flange 4150 / 4160 carburetor and square flange Holley EFI throttle body applications.
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671 871 Blower Supercharger injector carburetor adapter gasket base gasket
