HKS 1mm Stopper Head Gasket

2008–2023 Mitsubishi Evolution EVO X 4B11T (GSR & MR) 2.0L Turbo

Part #: 23001-AM006

Overview

The HKS 1mm Stopper Head Gasket is a high-quality performance upgrade designed specifically for the Mitsubishi Evolution EVO X models from 2008 onward. Whether you're building a street-driven machine or preparing for serious performance applications, this gasket provides a reliable sealing solution that supports increased engine performance and durability. Crafted with precision and engineered for enthusiasts who demand excellence, this head gasket helps maintain optimal compression and prevents leaks under high boost conditions.

If you're looking to enhance your EVO X's performance, improve compression ratios, or replace a worn or damaged gasket, the HKS stopper head gasket offers an excellent choice. Its 1mm thickness strikes a balance between increased compression and reliable sealing, making it suitable for both daily driving and spirited track use. This gasket is compatible with both GSR and MR models, ensuring a perfect fit for your Mitsubishi Evolution.

Key Features

The HKS 1mm Stopper Head Gasket incorporates several advanced features that set it apart from standard OEM gaskets:

• Constructed from high-quality materials designed to withstand high temperatures and pressures typical of turbocharged engines.
• 1mm thickness provides a slight increase in compression ratio, supporting improved power output and throttle response.
• Engineered with a stopper design that enhances sealing integrity, reducing the risk of head gasket failure under high boost or aggressive tuning.
• Precision-machined to ensure perfect fitment and consistent sealing surface contact, minimizing the chance of leaks or blow-by.
• Compatible with both GSR and MR models, ensuring versatility across the EVO X lineup.
• Designed to support increased performance modifications, including upgraded turbochargers, intercoolers, and fueling components.
• Manufactured by HKS, a trusted name in Japanese performance automotive parts, known for durability and high standards.

Construction & Design

The HKS head gasket features a robust construction utilizing high-strength materials capable of enduring the rigors of high-performance tuning. Its multi-layer design ensures excellent sealing capabilities, even under elevated boost pressures. The gasket's precise machining and stopper design help prevent gasket creep and blowout, which are common issues in heavily modified engines. The 1mm thickness is carefully selected to optimize compression without compromising reliability, making it suitable for a wide range of tuning applications.

Installation & Fitment

The HKS 1mm Stopper Head Gasket is designed as a direct replacement for the factory gasket on the Mitsubishi Evolution EVO X 4B11T engine. Installation requires standard engine disassembly procedures, including removing the cylinder head. It is recommended to follow proper torque specifications and sequence during reassembly to ensure optimal sealing and longevity. No additional modifications or tuning are necessary solely for gasket installation, but a professional installation is advised for best results, especially when combined with other performance upgrades.

• Designed for easy bolt-on installation with OEM or aftermarket cylinder heads.
• No cutting, drilling, or special modifications are required.
• Ensure the engine is properly cleaned and the mating surfaces are free of debris before installation.

What's Included

• HKS 1mm Stopper Head Gasket for Mitsubishi Evolution EVO X
• Installation instructions (if provided)

Ideal For

• Enthusiasts building high-performance EVO X engines
• Owners replacing a worn or damaged head gasket
• Performance tuners seeking increased compression and sealing reliability
• Track and street drivers aiming for improved engine durability under high boost