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Cometic C5711-140 MLS Cylinder Head Gasket for Pontiac - 400/428/455 V8

(Pontiac GTO 1968-73, Firebird 1968-79, Grand Prix 1968-77, Grand Am 1973-75, Bonneville 1968-78, LeMans 1968-77, Catalina 1968-78 + 12 more models)

Part of: Cometic MLS Cylinder Head Gasket Bore Honda

Other options in this family: Cometic C4311-040 Cometic C4251-030 Cometic C4232-030 Cometic C4962-028 Cometic C5434-051

Manufacturer

Picture for manufacturer Cometic

Part Number

C5711-140
4 reviews
Sale Price

$228.77

Estimated ship date Thursday, November 26

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Product Details

The Cometic C5711-140 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Pontiac 400, 428, and 455 cubic inch V8 engines. This high-performance gasket features a 4.160-inch bore diameter and a compressed thickness of .140 inches (140 thousandths), making it ideal for both stock rebuilds and high-performance applications.

Key Features:

  • Multi-Layer Steel (MLS) construction for superior sealing and durability
  • 4.160" bore diameter optimized for Pontiac big-block V8 engines
  • .140" compressed gasket thickness
  • Engineered to withstand extreme cylinder pressures and temperatures
  • Accommodates thermal expansion and engine movement
  • Reusable design allows for multiple installations when properly maintained

Cometic's MLS gaskets utilize multiple layers of stainless steel with proprietary coatings to create a gasket that conforms to sealing surfaces while maintaining structural integrity. The embossed layers provide multiple sealing points that compensate for minor surface imperfections. This gasket is designed for Pontiac 400, 428, and 455 V8 engines commonly found in GTOs, Firebirds, Trans Ams, and other classic Pontiac performance vehicles.

Application Note: Proper surface preparation is critical for MLS gasket installation. Cylinder head and block surfaces should have a 50 RA finish or smoother for optimal sealing performance.

Products specifications

Fits

Pontiac GTO 1968-73, Firebird 1968-79, Grand Prix 1968-77, Grand Am 1973-75, Bonneville 1968-78, LeMans 1968-77, Catalina 1968-78, Tempest 1968-70, Parisienne 1968-74, 1976, Grandville 1971-75, Executive 1968-70, Grand LeMans 1975-77 + 7 more models

Prop 65

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

Material

Multi-layer Steel

Best prices I could find anywhere! Fast shipping. Will definitley buy from again.

Just order the 1108 turn over ball for 2010 Super Duty and received it within (5) days. Just can't wait to put it on and start pulling the trailer with my new diessel.

Lowest prices around the web and excellent customer service. The only real issue was the wait between placing the order and when it was shipped. Took 4 days but I chalk that up to the large amount of business they due to their prices being so competitive. For the lowest prices that I've seen I didn't mind waiting a bit longer!

Quick shipping, customer service followed through.

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