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Cometic C5434-065 MLS Cylinder Head Gasket Chevy Big Block Bore - for V8 4.630

(Chevrolet Camaro 1967-72, Corvette 1965-74, Impala 1965-76, Malibu 1965-67, 1973-75, C1500 1990, Chevelle 1965-73, Blazer 1973-74 + 96 more models)

Manufacturer

Picture for manufacturer Cometic

Part Number

C5434-065
6 reviews
Sale Price

$138.88

Estimated ship date Friday, November 20

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Live-in-stock inventory

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Fitment guaranteed

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Product Details

The Cometic C5434-065 is a premium multi-layer steel (MLS) cylinder head gasket engineered for Chevrolet Mark-IV and GM Gen-V/VI Big Block V8 engines. This high-performance gasket features a .065" compressed thickness and accommodates a 4.630" bore diameter, making it ideal for aftermarket cylinder head installations and performance engine builds.

Key Features:

  • Multi-layer steel construction provides superior sealing and durability under extreme cylinder pressures
  • 4.630" bore diameter designed for both stock and modified big block applications
  • .065" compressed gasket thickness allows for precise compression ratio tuning
  • Undersized water ports enable custom machining and fitment optimization for aftermarket cylinder heads
  • Compatible with Chevrolet Mark-IV, GM Gen-V, and Gen-VI Big Block V8 engines
  • Engineered to withstand high-performance and racing applications

Cometic MLS gaskets utilize multiple layers of stainless steel with advanced coating technology to provide exceptional combustion sealing while maintaining flexibility to compensate for minor surface imperfections. The undersized water ports give engine builders the flexibility to custom-machine coolant passages to match specific aftermarket cylinder head designs, ensuring optimal cooling system performance.

Products specifications

Fits

Chevrolet Camaro 1967-72, Corvette 1965-74, Impala 1965-76, Malibu 1965-67, 1973-75, C1500 1990, Chevelle 1965-73, Blazer 1973-74, C10 Pickup 1968-74, Caprice 1966-76, C10 1975-80, El Camino 1966-75, Monte Carlo 1970-75, Nova 1969-72 + 90 more models

Prop 65

WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov

Material

Multi-layer Steel

Great price, fast ship time.

Fat and easy site to order from

I think my part should have been delivered sooner as my shipment notice came to me on May 26 and I contacted customer service on May 29 asking why it hadn't actually been shipped at all and then I finally received on June 1. All worked out except the part was the wrong part which I believe is my fault so I will be returning it. I would order again tho

Great prices!

Awesome service

I got my parts 2 days early witch is always nice free shipping and no tax parts where a very good price they hold up very well if I had questions they where right there to answer and where very nice I would recomend them to anyone great place and they will be getting more of my business.

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