Cometic Gasket MLX Head Gasket

2020–2023 Toyota GR Supra B58/B58H Engine

C14144-042

Overview:

The Cometic MLX Head Gasket is a precision-engineered replacement gasket designed specifically for the Toyota GR Supra models from 2020 through 2023 equipped with the B58 or B58H engine. Crafted to meet the demanding requirements of high-performance applications, this .042" thick cylinder head gasket ensures a reliable seal between the cylinder head and engine block, maintaining optimal compression and preventing leaks under extreme conditions.

Ideal for enthusiasts and professional tuners alike, the MLX gasket supports enhanced engine performance and durability, making it an essential upgrade or replacement part for those seeking to maintain or improve the integrity of their Supra’s powertrain.

Key Features:

Engineered for durability and performance, the Cometic MLX Head Gasket offers the following key features:

• Precision thickness of .042" to maintain proper combustion chamber volume and compression ratio
• Designed for 83mm bore size, matching the exact specifications of the Toyota B58/B58H engine
• Multi-layer steel (MLS) construction for superior sealing under high cylinder pressures
• Enhanced resistance to heat and chemical degradation for long-lasting performance
• Compatible with both stock and modified engine setups
• Manufactured by Cometic Gasket, a trusted name in high-performance sealing solutions
• Provides excellent sealing against combustion gases, coolant, and oil leaks
• Ideal for both street and track use, supporting aggressive tuning and increased boost levels

Construction & Design:

The Cometic MLX Head Gasket features a multi-layer steel design that combines several thin layers of high-grade stainless steel with elastomer coatings. This construction provides a robust and flexible seal capable of withstanding the thermal expansion and contraction cycles typical in high-performance engines. The gasket’s design ensures uniform pressure distribution across the sealing surface, minimizing the risk of warping or gasket failure.

Manufactured to exact OEM bore dimensions of 83mm, the gasket maintains precise alignment and fitment, critical for maintaining engine reliability and performance. The .042" thickness balances durability with the need to preserve factory compression ratios, making it suitable for both stock rebuilds and performance upgrades.

Installation & Fitment:

This head gasket is a direct fit replacement for the Toyota GR Supra models from 2020 to 2023 equipped with the B58 or B58H engine. Installation requires standard head gasket replacement procedures, including proper surface preparation and torque specifications as outlined by Toyota. No modifications to the engine block or cylinder head are necessary, ensuring a straightforward installation process for experienced mechanics and professional shops.

Using the Cometic MLX gasket helps maintain engine integrity during rebuilds or upgrades, providing peace of mind when pushing the Supra’s performance limits.

What's Included:

• One Cometic MLX Cylinder Head Gasket (.042" thickness, 83mm bore)

Ideal For:

This gasket is ideal for Toyota GR Supra owners who require a reliable, high-quality head gasket for maintenance, engine rebuilds, or performance enhancements. It is especially suited for enthusiasts who engage in spirited driving, track days, or tuning modifications that increase cylinder pressures beyond stock levels. The Cometic MLX gasket ensures a durable seal that supports both daily driving and high-performance applications without compromise.

Cometic Gasket supplies high-performance sealing solutions for motorsports and high-stress engine builds, with a strong focus on modern gasket materials like multi-layer steel (MLS) head gaskets. Their catalog spans head gaskets and complete gasket sets across a wide range of applications, helping builders maintain reliable combustion and fluid sealing under extreme pressure and heat.