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Cometic C5634-070 MLS Cylinder Head Gasket GM/Mercury Marine Big Block Bore - V8 4.500

Part of: Cometic MLS Cylinder Head Gasket Chevy Big Block Bore

Other options in this family: Cometic C5331-080 Cometic C5816-045 Cometic C5332-040 Cometic C5760-040 Cometic C5434-066

Manufacturer

Picture for manufacturer Cometic

Part Number

C5634-070
12 reviews
Sale Price

$138.66

Estimated ship date Thursday, November 26

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Product Details

The Cometic C5634-070 is a Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM and Mercury Marine Big Block V8 Gen-IV, Gen-V, and Gen-VI engines. This high-performance gasket features a .070" compressed thickness and is designed to accommodate a 4.500" bore diameter.

Key Features:

  • Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme temperatures and pressures
  • .070" (1.78mm) compressed gasket thickness for precise deck height control
  • 4.500" bore diameter optimized for big block applications
  • Designed for 4-bolt configuration in lifter valley for enhanced strength and reliability
  • Compatible with GM and Mercury Marine Gen-IV, Gen-V, and Gen-VI Big Block V8 engines
  • Cometic's MLS technology features multiple layers of stainless steel with elastomeric coatings for maximum combustion sealing

Cometic's MLS gaskets are the preferred choice for high-performance and marine applications where reliability and consistent sealing are critical. The multi-layer design allows the gasket to adapt to minor surface imperfections while maintaining superior combustion seal integrity, making it ideal for both stock and modified engine builds.

Products specifications

Prop 65

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

Material

Multi-layer Steel

Easy!!

nice thanks

sounds too inexpensive, but hey you only live once...

Best price for the item I needed. Very fast shipping and there consumer service was great on the phone.

Best price found on product as well as easiest ordering options. To bad shipping is high.

great service and fast shipping and the best prices by far

You can tell customer service is important to this company. Not only were the prices lower than other places but they communicate the status of the order and shipping very well. They obviously care what people think. I was suspicious of all the positive comments but decide to try them anyways. Very happy I did and definitely plan on buying from them again.

Great prices and fast shipping. Will use this company many more times in the future.

Easy to use website.

I ordered online with autoplicity via google checkout. It was easy and a real good price compared to other sites. The communication was great every step of the way. Order confirmation, order tracking number and shipping number. Super fast shipping for a heavy item (springs)and was in perfect condition. I Will shop with them again.

Simple and fast checkout

Best prices, lack of info on parts. Well worth my time to research on another site and buy here but still an inconvenience. Had 2 orders with Auto Parts Warehouse that something became out of stock days after my order..

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