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  See more parts for Buick Century
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Cometic Gaskets .066" MLS-5 Cylinder Head Gasket for Buick Regal 1975-1987, 3.86" Bore - C5691-066

If you're looking to keep your Buick or Chevy running strong, you might want to check out these Cometic MLS Head Gaskets. These bad boys are designed for high-output engines, so they can handle the heat without breaking a sweat. No need for messy sealants here; just drop them in and let them do their thing.

What makes these gaskets stand out? Well, they're made from multiple layers of stainless steel, which means they're tough as nails. They can take the shearing forces that come from aluminum heads sitting on aluminum or cast iron blocks. Plus, the outer layers are embossed and coated with Viton—a heat-resistant rubber that can handle temperatures up to 482°F (that's 250°C for the metric folks). This stuff is built to withstand all kinds of harsh sealing conditions, so you know you're getting something reliable.

Now, let's talk specifics. These gaskets have a bore diameter of 3.86 inches and a compressed thickness of 0.066 inches. They’re perfect for stock and Stage I-II heads on Buick's 192, 231, and 252 cubic inch V6 engines. If you’re working on a project with any of these engines, you’ll appreciate the solid fitment and performance.

Here’s what you need to know:

  • Bore Diameter: 3.860"
  • Cylinder Head Type: Stock and Stage I-II Heads
  • Engine: Buick 192, 231, 252ci V6
  • Thickness: .066"

These gaskets fit a bunch of models, so here’s the rundown:

  • Buick Century (1975-1981 & 1984-1988)
  • Buick Electra (1980-1990)
  • Buick LaCrosse (2005-2009)
  • Buick LeSabre (1976-2005)
  • Buick Lucerne (2006-2008)
  • Buick Park Avenue (1991-2005)
  • Buick Reatta (1988-1991)
  • Buick Regal (1975-1987 & 1990-2004)
  • Buick Riviera (1979-1993 & 1995-1999)
  • Buick Skyhawk (1975-1980)
  • Buick Skylark (1975-1979)
  • Cadillac DeVille (1980-1982)
  • Cadillac Eldorado (1981-1982)
  • Cadillac Fleetwood (1980-1982)
  • Cadillac Seville (1981-1982)
  • Chevrolet Camaro (1980-1981 & 1995-2002)
  • Chevrolet Caprice (1980-1985)
  • Chevrolet El Camino (1978-1984)
  • Chevrolet Impala (1980-1985 & 2000-2005)
  • Chevrolet Lumina (1998-1999)
  • Chevrolet Malibu (1978-1983)
  • Chevrolet Monte Carlo (1978-1987 & 1998-2005)
  • Chevrolet Monza (1978-1980)
  • Pontiac Bonneville (1987-2005)
  • Pontiac Firebird (1977-1981 & 1989 & 1995-2002)
  • Pontiac Grand Prix (1997-2008)

So, if you’ve got one of those engines and you’re ready to keep things sealed up tight, these Cometic MLS gaskets are a solid choice. They’re built to last and designed for performance, so you can keep your ride running like a champ.

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
1975-1981, 1984-1988
 Buick Century
1980-1990
 Buick Electra
2005-2009
 Buick LaCrosse
1976-2005
 Buick LeSabre
2006-2008
 Buick Lucerne
1991-2005
 Buick Park Avenue
1988-1991
 Buick Reatta
1975-1987, 1990-2004
 Buick Regal
1979-1993, 1995-1999
 Buick Riviera
1975-1980
 Buick Skyhawk
1975-1979
 Buick Skylark
1980-1982
 Cadillac DeVille
1981-1982
 Cadillac Eldorado
1980-1982
 Cadillac Fleetwood
1981-1982
 Cadillac Seville
1980-1981, 1995-2002
 Chevrolet Camaro
1980-1985
 Chevrolet Caprice
1978-1984
 Chevrolet El Camino
1980-1985, 2000-2005
 Chevrolet Impala
1998-1999
 Chevrolet Lumina
1978-1983
 Chevrolet Malibu
1978-1987, 1998-2005
 Chevrolet Monte Carlo
1978-1980
 Chevrolet Monza
1987-2005
 Pontiac Bonneville
1977-1981, 1989, 1995-2002
 Pontiac Firebird
1997-2008
 Pontiac Grand Prix

Cometic Gaskets Banner

Who is Cometic?

Cometic is a company known for manufacturing gaskets and engine seals for different engines. They cater to various industries such as the marine, industrial, agricultural, and automotive sectors. The company was established back in 1989 and has since provided high performance sealing solutions worldwide.

Motorsport Participation

The company is considered as the leading supplier when it comes to gaskets and seals worldwide. They have provided high-performance gaskets in various racing events such as NASCAR, GNCC, and AMA. They helped top racing teams compete at the highest level by improving engine reliability.

Built for Extreme Performance

Whether you are into endurance races at more than 220mph or setting the fastest drag records in 2000 hp top fuel race cars, Cometic has the right product for you. They design their products to withstand extreme temperatures and pressures. Hence, they are the brand chosen by the best in motorsports.

Best Value of Product

Cometic has always been dedicated to providing high-quality products that provide customer satisfaction. They have always given their customers the best product at the most competitive price. 

Quality in Every Product

The company is housed in a 70,000 square foot facility with state-of-the-art manufacturing equipment that helps them create products that are superior compared to its competitors. Using premium materials, they are able to develop gaskets that provide proper seals every time. 

Purchase Cometic Products at Vivid Racing

If you are in search of a high-quality gasket for your engine, then Cometic is the brand for you. Designed for OEM or high-performance applications, Cometic has got you covered. To know more about them, visit Vivid Racing and check out their list of products that fit your needs.












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