Engines and Components› Engine Covers, Pans and Dress-Up Components

Mr. Gasket

Ultra-Seal Head Gasket Fits 1963-1976 Oldsmobile 330-455 V8 4.230 Inch Gasket Bore Mr Gasket

$289.17

SKU: M00S 5788G

In Stock
In Stock
Ships by Jun 10
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The Mr. Gasket 5788G is an Ultra-Seal head gasket designed for Oldsmobile V8 engines. It features a five-layer composite construction with a graphite core and perforated steel outer layers.

This gasket has a bore size of 4.230 inches and a compressed thickness of 0.038 inches. The Ultra-Seal design provides stability, compressibility, and high-temperature endurance.

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 5788G

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.

View Full Return Policy