

Specifications
- Brand
- Cometic Gasket
- Part #
- C5693-066
- UPC
- 191070137144

Cometic 75-87 Buick V6 196/231/252 Stage I & II 4.09 inch Bore .066 inch MLS-5 Head Gasket
$123.94
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Cometic Multi-Layer Steel head gasket for Buick V6 engines with 4.09" bore. Ensures a solid seal for high-output builds.
Key Features
- Fits a wide range of Buick, Chevrolet, and Cadillac vehicles from the late 1970s to the early 2000s.
- Multi-Layer Steel (MLS) construction offers increased strength and rebound resistance.
- Outer layers are coated with Viton, a heat-resistant rubber material suitable for high temperatures.
- Designed for a 4.090 inch bore, suitable for Buick Stage I and Stage II V6 engines.
- Compressed operating thickness is 0.066 inches.
- Suitable for use with aluminum heads to aluminum blocks and aluminum heads to cast iron blocks.
⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more
Product Details
If you're rebuilding the top end of a Buick V6 engine from the late 70s through the early 2000s, a reliable head gasket is crucial. This Multi-Layer Steel (MLS) gasket from Cometic is built to handle the demands of performance engines, offering a strong seal between your cylinder head and block. It's designed to work with both aluminum and cast iron blocks, and its construction helps prevent the shearing forces that can occur when dissimilar metals are used together.
Cometic uses multiple layers of stainless steel for increased strength and corrosion resistance. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482°F (250°C) and works well on various surface finishes. The compressed thickness of this gasket is 0.066 inches, and it's made for a 4.090-inch bore, fitting Buick Stage I and Stage II V6 engines. Because it's an MLS design, it doesn't require any additional sealants, making installation more straightforward.
This gasket fits a wide range of Buick models, including the Century, LeSabre, and Regal, as well as many Chevrolet and Cadillac vehicles from the same era. It's a well-built option for anyone looking for a dependable seal in their engine rebuild.
Specifications
- Brand
- Cometic Gasket
- Manufacturer Part #
- C5693-066
- UPC
- 191070137144
Frequently Asked Questions
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Cometic 75-87 Buick V6 196/231/252 Stage I & II 4.09 inch Bore .066 inch MLS-5 Head Gasket


