HKS 2301-RM006 Metal Head Gasket 1.2mm Stopper for 1990-1999 4G63 Turbo

Vehicle Fitment

• 1990-1999 Mitsubishi Eclipse (GST/GSX), Eagle Talon TSi, Plymouth Laser RS (4G63BT Turbo)

Features

• High-performance metal head gasket engineered to seal under extreme boost pressure
• Stopper-type multi-layer steel construction for maximum combustion sealing
• Special fluorine rubber coating for improved heat and corrosion resistance
• Designed to maintain integrity under high RPM and turbocharged conditions
• Enhanced resistance to warpage compared to standard gaskets
• Precise bore alignment (86 mm) for 4G63BT cylinder head and block
• Optimized combustion sealing ring for increased reliability
• Ideal for performance-tuned engines and high-boost applications

Specifications

• Part Number: 2301-RM006
• Gasket Type: Stopper-type multi-layer steel
• Thickness: 1.2 mm
• Bore Size: 86 mm
• Compression Ratio (approx): 8.6:1 reference
• Engine Compatibility: Mitsubishi 4G63BT turbocharged I4
• Fitment Years: 1990-1999
• Applications: Eclipse, Talon, Laser turbo engines with 4G63BT

Included Components

• 1x Head Gasket (Stopper-Type, 1.2 mm)

Product Description

The HKS 2301-RM006 Metal Head Gasket is a high-performance replacement gasket designed specifically for turbocharged Mitsubishi 4G63BT engines found in 1990-1999 Mitsubishi Eclipse (GST/GSX), Eagle Talon TSi, and Plymouth Laser RS models. Built for enthusiasts and tuners who push their engines beyond stock conditions, this gasket delivers superior sealing under high-boost and high-temperature environments where OEM gaskets may fail.

Featuring a stopper-type multi-layer steel design with a fluorine rubber coating, the gasket creates an effective seal around the combustion chamber to prevent leaks and maintain compression. Its 1.2 mm thickness and 86 mm bore size are optimized to balance compression and durability, making it ideal for performance upgrades, boosted and tuned 4G63 engines. HKS engineered this gasket to resist warpage and provide consistent sealing even under demanding track or street-tuned conditions.