What does MLX technology mean for this head gasket?

MLX stands for Multi-Layer Stopper. This technology uses an integrated stopper layer to improve the seal around the combustion chamber and increase clamp load without distorting the cylinder bore.

Do I need to use any sealant with this Cometic head gasket?

No, this Cometic MLX head gasket is designed to be installed without any additional sealants. It provides a complete seal on its own.

Are these head gaskets suitable for high-performance Duramax builds?

Yes, Cometic MLX head gaskets are well-regarded for their robust construction and sealing capabilities, making them a solid choice for both stock repairs and performance-oriented Duramax engine builds.

Specifications

Brand: Cometic Gasket
Part #: C15375-053

Cometic GM LB7/LLY/LBZ/LMM/LGH/LML Duramax .053in MLX Cylinder 4.130in Bore RHS Head Gasket

Name: Cometic GM LB7/LLY/LBZ/LMM/LGH/LML Duramax .053in MLX Cylinder 4.130in Bore RHS Head Gasket
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-gm-lb7-lly-lbz-lmm-lgh-lml-duramax-053in-mlx-cylinder-4-1-t14-718770
Price: 207.65 USD
Availability: BackOrder

$207.65

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Cometic GM Duramax .053in MLX Head Gasket for 4.130in bore. Requires no sealants or re-torque for a solid seal.

Key Features

Fits 2001-2016 GM 6.6L Duramax engines.
MLX (Multi-Layer Stopper) technology for improved sealing and clamp load.
Designed for a 4.130-inch bore with a .053-inch gasket thickness.
Requires no sealants or re-torque after installation.
Integrated stopper layer helps prevent bore distortion.

⚠️ 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

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Will it fit your car?

About this part

Product Details

If you're working on the top end of your GM Duramax diesel, specifically models like the LB7, LLY, LBZ, LMM, LGH, or LML, this Cometic MLX head gasket is a solid choice. It's built to seal the combustion chamber effectively for a 4.130-inch bore with a .053-inch thickness, which is a common specification for these engines. This gasket is designed to handle the pressures and heat generated in these powerful diesel engines.

The MLX technology Cometic uses here incorporates an integrated stopper layer. This layer helps improve the clamping force around the cylinder bore without causing distortion, ensuring a strong seal. A notable benefit is that these gaskets do not require any additional sealants, and they also don't need to be re-torqued after installation, simplifying the assembly process. This makes them a popular option for rebuilds and repairs where reliability and ease of installation are important.

This gasket fits a wide range of GM trucks and SUVs equipped with the 6.6L Duramax engine from 2001 through 2016, including popular models like the Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD. Always refer to your vehicle's specific service manual for detailed installation procedures and torque specifications.