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Exterior Components Body Panels and Components

Mr. Gasket

Ultra-Seal Header Gaskets Fits 1964-1980 Oldsmobile 330-455 V8. Rectangular Ports, 1.55 Inch x 1.92 Inch Mr Gasket

$50.84 $47.00 Save $3.84

SKU: M00S 5945

In Stock
In Stock
Ships by Jul 30
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Mr. Gasket Ultra-Seal header gaskets are designed for Oldsmobile V8 engines with 330-455 cubic inch displacements. These gaskets feature rectangular ports measuring 1.55 inches by 1.92 inches and are constructed with a high-temperature steel core and graphite facing.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMr. Gasket
Part NumberM00S 5945

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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