Cometic Gasket MLS Head Gasket

1989–1998 Nissan RB25 6-Cylinder

Part #: C4318-060

Overview

The Cometic Gasket MLS Head Gasket for the Nissan RB25 6-cylinder engine is a high-quality, multi-layer steel (MLS) gasket designed to provide superior sealing performance for your engine rebuild or upgrade. Crafted specifically for the RB25 engine, this gasket ensures a reliable seal between the cylinder head and engine block, helping to prevent leaks and maintain optimal compression. Whether you're building a performance street car, a dedicated drag racer, or an off-road machine, this gasket is engineered to meet the demands of high-performance applications.

Designed with durability and precision in mind, the Cometic MLS head gasket offers an excellent solution for enthusiasts seeking to restore or enhance their engine's reliability and power output. Its construction helps support increased horsepower and torque, making it ideal for those pushing their Nissan RB25 engine beyond stock specifications. With its precise fit and high-quality materials, this gasket ensures consistent sealing under high heat and pressure conditions, contributing to improved engine longevity and performance.

Key Features

The Cometic MLS Head Gasket incorporates advanced engineering and premium materials to deliver outstanding sealing capabilities and durability. Key features include:

• Multi-layer steel (MLS) construction with multiple steel layers for enhanced strength and flexibility.
• Precisely engineered 87mm bore diameter to match the Nissan RB25 engine specifications.
• Thick .060 inch (1.52mm) design to accommodate high compression ratios and boost pressures.
• High-quality, corrosion-resistant steel layers that resist warping and deformation under extreme conditions.
• Optimized sealing surface to prevent coolant and oil leaks, ensuring consistent engine operation.
• Engineered for high-performance applications, supporting increased boost and power output.
• Manufactured to strict quality standards for reliable, long-lasting performance.

Construction & Design

The MLS head gasket features a multi-layer steel design that combines strength, flexibility, and excellent sealing properties. Each gasket is precision-cut using advanced manufacturing techniques to ensure perfect fitment and sealing surface contact. The steel layers are coated and treated to resist corrosion and thermal expansion, maintaining integrity over prolonged use. The .060 inch thickness provides a robust barrier capable of handling higher compression ratios and boost pressures, making it suitable for modified or high-performance engines.

Performance & Sound

While this gasket is primarily designed for sealing and durability, its high-quality construction contributes to maintaining consistent compression and combustion efficiency. Proper sealing reduces the risk of head gasket failure, which can cause overheating, loss of power, or engine damage. The gasket's reliable seal helps support increased horsepower and torque, ensuring your engine performs at its best under demanding conditions.

Installation & Fitment

The Cometic MLS Head Gasket is a direct replacement for the factory gasket on the Nissan RB25 engine. Installation requires standard engine rebuild procedures, including proper cleaning of mating surfaces and torqueing to manufacturer specifications. No special modifications or machining are typically necessary, but it is recommended to follow proper torque sequences and use new head bolts if specified. This gasket is designed for easy installation with a perfect fitment, providing a secure seal without the need for additional sealing compounds.

• Designed specifically for the Nissan RB25 6-cylinder engine (1989–1998).
• Intended for use in high-performance rebuilds, engine upgrades, or repair jobs.
• Compatible with stock and modified engine setups.

What's Included

• One Cometic MLS Head Gasket with 87mm bore and .060 inch thickness
• Installation instructions (if provided by manufacturer)

Ideal For

• Engine rebuilds for Nissan RB25 engines
• High-performance street and racing applications
• Enthusiasts seeking reliable sealing for boosted or high-compression setups

Emissions Note

This product is designed for off-road, racing, or recreational use only and may not be legal for use on public roads in all jurisdictions. Please verify local regulations before installation.