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Cometic C5403-120 MLS Head Gasket Chevy Small Block Bore Thick - 4.200 120

(GMC G2500 1979-86, K1500 1979-86, C1500 1979-86, K2500 1979-86, Jimmy 1970-86, C3500 1979-86, K2500 Suburban 1979-86, K3500 1979-86 + 168 more models)

Manufacturer

Picture for manufacturer Cometic

Part Number

C5403-120
9 reviews
Sale Price

$232.00

Estimated ship date Friday, November 20

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Product Details

The Cometic C5403-120 is a precision-engineered Multi-Layer Steel (MLS) cylinder head gasket designed specifically for Chevrolet Gen-1 Small Block V8 engines. This gasket features a 4.200-inch bore diameter with a compressed thickness of .120 inches, making it ideal for performance and racing applications requiring precise compression control.

Key Features:

  • Multi-Layer Steel construction provides superior sealing and durability under extreme conditions
  • 4.200-inch bore diameter accommodates stroker builds and overbored applications
  • .120-inch compressed thickness allows for custom compression ratio tuning
  • Undersized water ports enable custom port matching and coolant flow optimization
  • Designed for aftermarket cylinder heads with flexibility for race applications
  • Embossed stainless steel armor around combustion chambers and fluid passages

Cometic's MLS gasket technology features multiple layers of stainless steel with an elastomeric coating that provides exceptional recovery and sealing properties. The undersized water ports allow engine builders to match-port the gasket to specific cylinder head configurations, optimizing coolant flow for custom applications. This gasket is engineered for high-performance and racing engines where precision sealing and durability are critical.

Products specifications

Fits

GMC G2500 1979-86, K1500 1979-86, C1500 1979-86, K2500 1979-86, Jimmy 1970-86, C3500 1979-86, K2500 Suburban 1979-86, K3500 1979-86, C15/C1500 Pickup 1967-74, C2500 1979-86, K1500 Suburban 1979-86, G25/G2500 Van 1967-74 + 164 more models

Prop 65

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

Material

Multi-layer Steel

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Overall good transaction had to go through PayPal to make the purchase, wasn't allowing me to use card info.

excellent ship time and exceptional pricing deffinatly will buy from here again

Fast shipping, product was excellent .

I ordered a hitch off of this site for Christmas, I have never heard of it nor did I know how they were, but they are great! Got my package in I'd say 4 days, very fast and it was exactly what I wanted! Only down fall was they charged me 3 times and I was short 150$ for a few days. I got my money back and I would definitely order again.

Smooth transaction, very pleased

They made a mistake with the shipping address, but, they took care of it very politely and professionally. Very nice. Thanks.

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