Cometic Gasket Cylinder Head Gasket

2020–2023 Toyota GR Supra B58/B58H Engine

C14144-052

Overview:

The Cometic B58/B58H Cylinder Head Gasket is a precision-engineered sealing solution designed specifically for the Toyota GR Supra models from 2020 through 2023. Crafted to accommodate the 83mm bore of the B58 and B58H engines, this .052" MLX gasket ensures a reliable and durable seal between the cylinder head and engine block. Ideal for enthusiasts and professional tuners alike, it supports high-performance applications while maintaining OEM-level reliability.

Whether you are performing an engine rebuild, upgrading your Supra for track use, or seeking a dependable replacement gasket, the Cometic cylinder head gasket offers superior sealing technology to withstand increased cylinder pressures and thermal stresses inherent in modern turbocharged engines.

Key Features:

Engineered for performance and durability, the Cometic B58/B58H Cylinder Head Gasket includes the following key features:

• Precision-cut to fit the 83mm bore of Toyota B58 and B58H engines
• .052" thickness MLX multi-layer steel construction for enhanced sealing
• Designed to handle high boost pressures and elevated combustion temperatures
• Superior resistance to blowout and gasket failure under demanding conditions
• Compatible with OEM head bolts and torque specifications
• Manufactured by Cometic Gasket, a trusted name in high-performance sealing solutions
• Ideal for both street and track applications on the Toyota GR Supra 2020–2023
• Ensures consistent compression and prevents coolant and oil leaks

Construction & Design:

The Cometic B58/B58H Cylinder Head Gasket features a multi-layer steel (MLS) design, utilizing multiple thin layers of high-grade stainless steel. This construction provides excellent durability and flexibility, allowing the gasket to maintain a tight seal despite the thermal expansion and contraction cycles experienced during engine operation. The .052" thickness is optimized to maintain proper combustion chamber volume and compression ratio, ensuring peak engine performance.

Cometic’s proprietary coating and precise manufacturing tolerances contribute to the gasket’s ability to resist corrosion and wear, making it a reliable choice for high-performance and OEM replacement applications. The gasket’s design also accommodates the unique bore and bolt pattern of the B58/B58H engine, ensuring a perfect fit and easy installation.

Installation & Fitment:

This cylinder head gasket is a direct fit replacement for the Toyota GR Supra models equipped with the B58 or B58H engine from 2020 to 2023. Installation requires standard engine disassembly procedures, including removal of the cylinder head. It is recommended to follow Toyota’s factory torque specifications and sequence when installing the gasket to ensure optimal sealing and engine longevity.

No modifications are necessary for proper fitment, making it suitable for both professional mechanics and experienced enthusiasts performing engine rebuilds or upgrades.

What's Included:

• One Cometic B58/B58H .052" MLX Cylinder Head Gasket (83mm Bore)

Ideal For:

This gasket is ideal for Toyota GR Supra owners seeking a high-quality, durable cylinder head gasket for maintenance, rebuilds, or performance upgrades. It is especially suited for those running boosted or high-output setups who require a gasket capable of withstanding increased cylinder pressures without compromising reliability.

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.