Cometic C15436-045 MLS Cylinder Head Gasket LHS 94.5mm for 18-23 Mustang GT 5.0L

Vehicle Fitment

• 2018-2023 Ford Mustang GT (5.0L Gen-3 Coyote V8 DOHC, RWD)
• 2018-2023 Ford Mustang GT Premium (5.0L Gen-3 Coyote V8 DOHC, RWD)
• 2019-2020 Ford Mustang Bullitt (5.0L Gen-3 Coyote V8 DOHC, RWD)
• 2021-2023 Ford Mustang Mach 1 (5.0L Gen-3 Coyote V8 DOHC, RWD)

Fitment Notes

• Left-hand side (LHS/driver side) gasket only - order C15435-045 separately for the right-hand side (RHS)
• Fits Gen-3 Coyote 5.0L DOHC engines only (2018-2023) - does not fit Gen-1 (2011-2014) or Gen-2 (2015-2017) Coyote engines due to cylinder head design differences and different bore sizes
• 94.5mm bore is the stock bore diameter for Gen-3 Coyote engines (Gen-1 and Gen-2 use 92mm or 94mm bore gaskets)
• Does not fit the 5.2L Voodoo flat-plane crank V8 (GT350/GT350R) or the 5.0L Gen-4 Coyote (2024+ Mustang GT)
• Gen-3 Coyote engines feature dual fuel injection (port + direct injection), distinguishing them from earlier generations

Features

• MLS (Multi-Layer Steel) construction with multiple embossed layers for maximum sealing performance
• 3 layers of stainless steel for strength, rebound capability, and corrosion resistance
• Viton (FKM) rubber-coated outer layers rated to 250°C (482°F) for harsh sealing environments
• PTFE topcoat for improved fret resistance and enhanced cold-seal performance
• HP Shim technology increases clamp load around the combustion chamber for improved sealability on open-deck blocks
• Load-controlled embossments conform load distribution across the sealing surface, reducing bore distortion
• No sealants or re-torquing required after installation
• Ideal for both aluminum head-to-aluminum block applications on the Coyote platform
• Suitable for naturally aspirated, supercharged, turbocharged, and nitrous applications
• Made in the USA at Cometic's facility in Concord, Ohio

Specifications

• Part Number: C15436-045
• Material: MLS (Multi-Layer Steel)
• Compressed Thickness: .045"
• Bore Size: 94.5mm (Round)
• Number of Layers: 3
• Orientation: Left-Hand Side (LHS/Driver Side)
• Engine Application: Ford 5.0L Gen-3 Coyote Modular V8 DOHC (305ci)

Included Components

• 1x Cometic MLS Cylinder Head Gasket (Left-Hand Side)

Product Description

The Cometic C15436-045 is a high-performance MLS (Multi-Layer Steel) cylinder head gasket designed for the left-hand side (driver side) of the Ford 5.0L Gen-3 Coyote Modular V8 DOHC engine. With a 94.5mm stock bore diameter and .045" compressed thickness across 3 layers of embossed stainless steel, this gasket delivers reliable sealing for both stock rebuilds and performance applications. The Viton-coated outer layers with PTFE topcoat provide exceptional resistance to heat, chemicals, and fret, while the HP Shim technology increases clamp load around the combustion chamber for superior sealability on the Coyote's open-deck block design.

This gasket fits the 2018-2023 Ford Mustang GT, GT Premium, Bullitt, and Mach 1 equipped with the Gen-3 Coyote 5.0L V8. The Gen-3 Coyote introduced a dual fuel injection system (port + direct injection), revised cylinder heads, and a larger 94.5mm bore compared to the Gen-2's 94mm, making the C15436 series specific to these model years. Builders working on Gen-1 (2011-2014) or Gen-2 (2015-2017) Coyote engines should reference other Cometic gasket series with the appropriate bore size, and the 2024+ Gen-4 Coyote requires a different gasket entirely due to further valve pocketing revisions.

Installation requires clean, debris-free mating surfaces with a recommended surface finish of 50 RA or finer for proper gasket seal. Cometic MLS gaskets go on dry - no supplemental sealants should be applied, as the factory Viton coating serves as the sealant. No re-torquing is required after installation. For a complete head gasket replacement, pair this LHS gasket with the corresponding RHS gasket (C15435-045). The .045" thickness provides slightly more compressed height than the .040" variant, useful for fine-tuning compression ratio or accommodating light head and block resurfacing.