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Gaskets and Seals Engine Gaskets and Seals

Mr. Gasket

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

$100.95 $92.85 Save $8.10

SKU: M00S 5788G

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INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

Part #: 5788G

Mr. Gasket Ultra-Seal Head Gaskets are a five layer (graphite core/perforated steel outer layers) composite construction.The graphite core has excellent thermoconductivity (transfers heat) away from hot spots in head preventing Gasket burn-out. They provide excellent stability, compressibility and high temperature endurance.A high temperature silicone coating ensures sealing of engine fluids. Compatible with cast iron or aluminum heads, they will not brinell (indent) aluminum cylinder heads.Suitable for high performance street, drag race and oval track use. Sold individually.Gasket Bore 4.230 inch, Compressed thickness 0.038 inchFive layer (graphite core/perforated steel outer layers) composite constructionGraphite core has excellent thermo-conductivity-transfers heat away from hot spots in head preventing Gasket burn-outProvides excellent stability, compressibility and high temperature enduranceCoated with high temperature silicone to ensure sealing of engine fluidsWill not brinell (indent) aluminum cylinder headsFor high performance street, drag race and oval track useDetails:Engine: OldsmobileCompressed Thickness: 0.038Compression Ratio: Up to 14:1Emission Code: 5Gasket Bore: 4.23Gasket Line: Ultra-SealMaterial: Graphite SteelQuantity Per Pkg.: 1Warranty: Manufacturer's Limited 90 Day Warranty

Features:

  • Five layer (graphite core/perforated steel outer layers) composite construction
  • Graphite core has excellent thermo-conductivity-transfers heat away from hot spots in head preventing gasket burn-out
  • Provides excellent stability, compressibility and high temperature endurance
  • Coated with high temperature silicone to ensure sealing of engine fluids
  • Will not brinell (indent) aluminum cylinder heads
  • For high performance street, drag race and oval track use

Fits 1963-1976 Oldsmobile 330-455 V8 - 4.230 Inch Gasket Bore

MIA's 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.

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Specifications

BrandMr. Gasket
Part NumberM00S 5788G

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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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