Cometic Gasket MLX Head Gasket

2019–2026 Ram 2500 & 3500 6.7L Diesel

Part #: C15266-054

Overview

The Cometic MLX Head Gasket is engineered specifically for the 2019 through 2026 Ram 2500 and 3500 models equipped with the 6.7L Cummins diesel engine. Designed to provide superior sealing performance under high combustion pressures, this gasket is an essential upgrade for diesel enthusiasts and professionals seeking reliability and durability. The MLX technology ensures a robust seal without compromising bore integrity, making it ideal for both stock and modified engines.

Whether you are performing a routine engine rebuild or upgrading your diesel powerplant, the Cometic MLX Head Gasket offers peace of mind with its advanced multi-layer stopper design. It eliminates the need for additional sealants or re-torquing, simplifying installation and ensuring consistent performance over time.

Key Features

The Cometic MLX Head Gasket incorporates innovative technology and premium materials to deliver exceptional sealing and durability. Key features include:

• Multi-Layer Stopper (MLX) technology for enhanced combustion chamber sealing
• Integrated stopper layer improves clamp load distribution without increasing bore distortion
• Embossed outer layers coated with Viton for superior chemical and heat resistance
• Compatible with high-performance and stock 6.7L Cummins diesel engines
• No sealants or re-torque required, simplifying installation
• Precision bore size of 4.327 inches and thickness of 0.054 inches for exact fitment
• Constructed from the same high-quality materials as Cometic’s MLS head gaskets
• Designed to withstand the demanding conditions of heavy-duty diesel applications

Construction & Design

The Cometic MLX Head Gasket is crafted from multiple layers of high-grade stainless steel, incorporating an integrated stopper layer that enhances sealing around the combustion chamber. This design minimizes bore distortion, which is critical for maintaining engine integrity and performance. The embossed outer layers are coated with Viton, a high-performance elastomer known for its resistance to heat, oil, and chemicals, ensuring long-lasting durability even under extreme operating conditions.

Every gasket undergoes precise manufacturing processes to meet stringent quality standards, guaranteeing a perfect fit and reliable sealing for the 6.7L Cummins diesel engines in Ram 2500 and 3500 trucks from 2019 to 2026.

Installation & Fitment

This head gasket is a direct replacement for the factory gasket on 2019–2026 Ram 2500 and 3500 trucks with the 6.7L Cummins diesel engine. Installation requires standard engine teardown procedures, and no modifications are necessary. Thanks to the MLX design, there is no need for additional sealants or re-torquing after installation, which reduces labor time and potential errors. It is recommended to follow the manufacturer’s torque specifications and installation guidelines to ensure optimal sealing and longevity.

What's Included

• One Cometic MLX Head Gasket (4.327" Bore, 0.054" Thickness)

Ideal For

This gasket is ideal for diesel truck owners, mechanics, and performance enthusiasts who demand reliable sealing for heavy-duty applications. It suits those performing engine rebuilds, upgrades, or repairs on 2019–2026 Ram 2500 and 3500 trucks with the 6.7L Cummins diesel engine. Its robust design also makes it suitable for vehicles subjected to high boost, increased cylinder pressures, or extended heavy towing and hauling duties.