Cometic Gasket FA20 Head Gasket

2013–2020 Subaru BRZ / 2017–2020 Toyota 86 FA20 Engine

C4588-042

Overview:

The Cometic FA20 Head Gasket is a premium multi-layer steel (MLS) gasket engineered specifically for the Subaru BRZ (2013–2020) and Toyota 86 (2017–2020) equipped with the FA20 or 4U-GSE engines. Designed to provide a reliable and durable seal between the cylinder head and engine block, this gasket is ideal for enthusiasts seeking enhanced engine longevity and performance under demanding conditions. Whether you are performing a rebuild, upgrade, or maintenance, the Cometic FA20 Head Gasket ensures a precise fit and dependable sealing to maintain optimal compression and prevent leaks.

Key Features:

Built with advanced materials and engineered for durability, the Cometic FA20 Head Gasket offers the following key features:

• Multi-layer steel construction with three to five layers of stainless steel for superior strength and resilience
• Embossed outer layers coated on both sides with heat-resistant Viton rubber, rated up to 250°C (482°F)
• Excellent rebound capability to maintain a consistent seal under varying load and thermal conditions
• Corrosion-resistant stainless steel layers to extend gasket life and reliability
• Precision engineered for the Subaru FA20D and Toyota 4U-GSE engines with an 89.5mm bore size
• .042 inch thickness optimized for sealing performance and durability
• Designed to withstand harsh sealing environments, including high combustion pressures and temperature fluctuations

Construction & Design:

The Cometic FA20 Head Gasket features a robust multi-layer steel design, combining three to five layers of high-grade stainless steel. This construction provides exceptional strength and flexibility, allowing the gasket to maintain a tight seal even under extreme thermal cycling and mechanical stress. The embossed outer layers are coated with Viton rubber on both sides, a material known for its excellent heat resistance and chemical stability. This coating enhances the gasket’s ability to seal against surface imperfections and resist degradation from engine fluids and combustion byproducts. The gasket’s precise dimensions and bore size ensure a perfect fit for the FA20 and 4U-GSE engines, supporting reliable engine performance and longevity.

Installation & Fitment:

The Cometic FA20 Head Gasket is designed as a direct replacement for the Subaru BRZ (2013–2020) and Toyota 86 (2017–2020) models equipped with the FA20 or 4U-GSE engines. Installation requires standard head gasket replacement procedures, including proper surface preparation and torque specifications to ensure optimal sealing. No modifications are necessary, making it suitable for both professional mechanics and experienced enthusiasts performing engine rebuilds or repairs. Using this gasket helps maintain factory-level sealing integrity while offering enhanced durability for performance applications.

What's Included:

• One Cometic MLS Head Gasket, .042 inch thickness

Ideal For:

This head gasket is ideal for Subaru BRZ and Toyota 86 owners who demand reliable sealing for their FA20 or 4U-GSE engines. It is especially suited for:

• Engine rebuilds and repairs requiring a high-quality replacement gasket
• Performance enthusiasts seeking improved durability under increased load and heat
• Daily drivers who want to maintain engine reliability with OEM-level fitment and enhanced materials
• Motorsport applications where consistent sealing under stress is critical

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.