HKS Grommet Type Head Gasket

2013–2020 Subaru FA20 2.0L Turbo Engine

Part #: 23002-AT002

Overview

The HKS 89.5mm Bore 1.2mm Thick Grommet Type Head Gasket is designed specifically for enthusiasts and tuners working with the Subaru FA20 engine, particularly in turbocharged and supercharged applications. As engine modifications increase power output, the head gasket plays a critical role in maintaining proper sealing and preventing costly leaks or failures. This gasket offers a reliable solution for high-performance builds, ensuring your engine maintains optimal compression and durability under demanding conditions.

Whether you're pushing your FA20-powered vehicle for spirited street driving, track days, or serious tuning projects, this gasket provides the peace of mind needed to support increased boost levels and power gains. Its innovative grommet design enhances sealing performance beyond traditional stopper-type gaskets, making it an excellent choice for high-stress applications.

Key Features

The HKS Grommet Type Head Gasket incorporates several advanced features to improve engine reliability and performance:

• Constructed with a high-quality, durable material that withstands elevated surface pressures typical in turbocharged and supercharged setups.
• Grommet design provides superior sealing capabilities by evenly distributing pressure around the cylinder head and block interface, reducing the risk of leaks under high boost conditions.
• Available in a high-thickness option (1.2mm) to compensate for head or block warping caused by machining or high thermal loads, ensuring a proper seal even after machining or in engines with slight surface irregularities.
• Designed specifically for the FA20 engine, ensuring precise fitment and compatibility with OEM and aftermarket components.
• Enhanced durability to support sustained high-performance operation, making it suitable for both daily driven and race applications.
• Manufactured by HKS, a trusted name in high-performance automotive parts, known for quality and innovation.

Construction & Design

This head gasket features a robust construction with a high-strength material that resists deformation and maintains sealing integrity under extreme conditions. The grommet-type design incorporates reinforced metal rings around the cylinder openings, which help prevent blowouts and leaks during high boost or high compression scenarios. The gasket's precise bore size of 89.5mm ensures compatibility with the FA20 engine's specifications, providing a tight, reliable seal.

The gasket's high thickness (1.2mm) option is engineered to accommodate machining or warping issues, offering a flexible solution for engine builders seeking to maximize durability and performance. Its manufacturing process involves meticulous quality control, ensuring consistent thickness and material integrity across production batches.

Installation & Fitment

The HKS Grommet Type Head Gasket is a direct replacement for the factory gasket on the FA20 engine. Its precise dimensions and design allow for straightforward installation with standard tools, making it suitable for both professional engine builders and experienced DIY enthusiasts. No special modifications or machining are required beyond what is necessary for engine assembly or head resurfacing.

It is recommended to follow proper torque specifications and procedures during installation to ensure optimal sealing and longevity. The gasket's high-quality construction ensures a secure fit, reducing the likelihood of leaks or gasket failure over time.

What's Included

• Grommet type head gasket with 89.5mm bore and 1.2mm thickness
• Installation instructions (if provided by HKS)

Ideal For

• Subaru FA20 engine owners upgrading or rebuilding for high-performance applications
• Turbocharged or supercharged FA20 builds seeking enhanced sealing and durability
• Engine tuners and racers requiring reliable head gasket solutions under increased boost pressures
• DIY enthusiasts and professional mechanics performing head gasket replacement or engine assembly