Cometic Gasket FA20 DOHC Head Gasket
2013–2020 Subaru BRZ / 2017–2020 Toyota 86 FA20 Engine
C4589-042
Overview:
The Cometic FA20 DOHC Head Gasket is engineered specifically for the Subaru BRZ (2013–2020) and Toyota 86 (2017–2020) equipped with the FA20 engine. Designed to provide a reliable and durable seal between the cylinder head and engine block, this multi-layer steel (MLS) gasket ensures optimal performance and longevity under demanding conditions. Ideal for enthusiasts and professional builders alike, it offers enhanced sealing capabilities to support both stock and modified engine setups.
Whether you are performing a rebuild, upgrading your engine, or seeking a dependable replacement gasket, the Cometic FA20 head gasket delivers consistent sealing performance to maintain engine integrity and prevent leaks.
Key Features:
This head gasket incorporates advanced materials and design features to meet the rigorous demands of high-performance and daily-driven applications:
- Multi-layer steel construction with 3 to 5 layers for superior strength and durability
- Outer layers embossed and coated with heat-resistant Viton rubber for enhanced sealing
- Viton coating withstands temperatures up to 250°C (482°F), resisting heat-related degradation
- Stainless steel layers provide excellent corrosion resistance and the ability to rebound under load
- Precisely engineered for the Subaru FA20D and Toyota 4U-GSE engines with an 89.5mm bore
- .042 inch thickness optimized for reliable sealing and gasket longevity
- Designed to handle a variety of harsh sealing environments, load conditions, and surface finishes
Construction & Design:
The Cometic FA20 head gasket features a robust multi-layer steel (MLS) design, combining three to five layers of stainless steel to deliver exceptional strength and flexibility. The stainless steel construction allows the gasket to maintain its shape and seal under thermal expansion and contraction cycles common in high-performance engines.
Each outer layer is embossed and coated on both sides with a Viton rubber material, which enhances the gasket’s ability to seal against irregularities in the cylinder head and block surfaces. Viton’s heat resistance up to 250°C (482°F) ensures the gasket remains effective even in demanding thermal environments, reducing the risk of leaks and gasket failure.
Installation & Fitment:
This head gasket is a direct fit replacement for Subaru BRZ models from 2013 through 2020 and Toyota 86 models from 2017 through 2020 equipped with the FA20 engine. Installation requires standard head gasket replacement procedures, including proper surface preparation and torque specifications as outlined by the vehicle manufacturer.
No modifications are necessary, making it an ideal choice for both OEM replacements and performance rebuilds. Always ensure the cylinder head and block surfaces are clean and flat to maximize sealing effectiveness.
What's Included:
- One Cometic FA20 DOHC Multi-Layer Steel Head Gasket (.042 inch thickness)
Ideal For:
This gasket is perfect for Subaru BRZ and Toyota 86 owners seeking a high-quality, durable head gasket for engine rebuilds, repairs, or performance upgrades. It suits enthusiasts who demand reliable sealing under stock and mildly modified conditions, as well as professional engine builders requiring consistent gasket performance.
