Cometic Gasket Head Gasket

2013–2020 Subaru BRZ / 2017–2020 Toyota 86 FA20D / 4U-GSE Engine

C4589-032

Overview:

The Cometic Head Gasket for Subaru BRZ (2013–2020) and Toyota 86 (2017–2020) is engineered to provide a reliable and durable seal for the FA20D and 4U-GSE engines. Designed for enthusiasts and professional mechanics alike, this gasket ensures optimal sealing performance under demanding conditions, helping to maintain engine integrity and prevent leaks. Its precise construction supports both street and track applications, making it an essential upgrade or replacement part for these popular sports cars.

Built to meet the rigorous demands of high-performance engines, this head gasket is ideal for those seeking dependable sealing with consistent thickness and durability. Whether you are performing routine maintenance or upgrading your engine components, the Cometic Head Gasket offers peace of mind with its proven design and materials.

Key Features:

This head gasket incorporates advanced materials and manufacturing techniques to deliver superior performance and longevity. Key features include:

• Multi-layer steel (MLS) construction with multiple embossed stainless steel layers for enhanced strength and sealing capability
• Outer layers coated with Viton rubber to improve chemical resistance and sealing against coolant and oil leaks
• Compressed operating thickness of 0.032 inches, ensuring precise fitment and optimal compression
• Designed specifically for the left-hand side (LHS) cylinder head of Subaru FA20D and Toyota 4U-GSE engines
• Compatible with engines featuring an 89.5mm bore diameter
• Manufactured by Cometic Gasket, a trusted name in high-performance sealing solutions
• Engineered to withstand high temperatures and pressures typical of performance driving
• Provides consistent sealing to prevent head gasket failure and maintain engine reliability

Construction & Design:

The Cometic Head Gasket is crafted from multiple embossed layers of stainless steel, which provide exceptional durability and resistance to warping under thermal stress. The use of stainless steel ensures corrosion resistance and long service life, even in harsh operating environments. The outermost layers are coated with Viton rubber, a high-performance elastomer known for its excellent chemical resistance to oils, coolants, and fuels, enhancing the gasket’s sealing capability and longevity.

The gasket’s compressed thickness of 0.032 inches is carefully controlled to maintain proper combustion chamber volume and compression ratio, critical for engine performance and efficiency. The precision engineering and quality materials make this gasket a reliable choice for both OEM replacement and performance upgrades.

Installation & Fitment:

This head gasket is designed for direct fitment on the left-hand side cylinder head of the Subaru BRZ models from 2013 through 2020 and Toyota 86 models from 2017 through 2020 equipped with the FA20D or 4U-GSE engines. Installation requires standard head gasket replacement procedures, including proper surface preparation and torque specifications as outlined by the vehicle manufacturer.

No modifications are necessary for fitment, making it a straightforward upgrade or replacement part for mechanics and enthusiasts. Proper installation ensures a reliable seal and helps prevent common issues such as coolant or oil leaks and head gasket failure.

What’s Included

• One (1) Cometic MLS Head Gasket, Left Hand Side

Ideal For:

This head gasket is ideal for Subaru BRZ and Toyota 86 owners seeking a high-quality replacement part that meets or exceeds OEM standards. It is well-suited for daily drivers, performance enthusiasts, and racers who demand reliable sealing under a variety of operating conditions. Whether restoring an engine or upgrading for enhanced durability, this gasket provides confidence and peace of mind.

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.