Metric Header Bolt 918G by Mr. Gasket – 12 Pack M8-1.25x25mm Steel

Description

Product Overview

The Mr Gasket 918G Metric Header Bolt set is engineered to meet the demanding requirements of modern exhaust systems. Each bolt is forged from high‑grade carbon steel, delivering exceptional tensile strength that can withstand the intense heat and vibration typical of performance applications. The M8-1.25x25mm dimensions provide a precise fit for a wide range of header configurations, while the black oxide coating adds a layer of corrosion resistance, extending the service life of the fastener. The compact hex head and integrated flange are specifically designed to occupy minimal space, allowing installation in confined engine bays where clearance is at a premium. This set of twelve bolts ensures you have enough components for multiple installations or replacements, reducing downtime and inventory costs. The product adheres to strict automotive standards, offering reliability that mechanics and enthusiasts alike can trust.

Usage

These metric header bolts are ideal for a variety of exhaust system upgrades, including performance headers, aftermarket manifolds, and custom racing builds. Whether you are installing a new turbocharger system or replacing worn bolts on a stock configuration, the 918G set provides the necessary durability and fit. The bolts are suitable for both gasoline and diesel engines, making them a versatile choice for a broad spectrum of vehicles. Installation is straightforward: simply align the bolt with the pre‑drilled hole, insert the hex head, and tighten to the manufacturer‑specified torque. The compact design ensures that even in tight spaces—such as under a hood with limited clearance—the bolt can be fully seated without interference. For DIY enthusiasts, the set offers a cost‑effective solution that eliminates the need to source individual bolts, while professional mechanics appreciate the consistency and quality that reduce the risk of thread stripping or premature failure.

Why Choose Us

Choosing the Mr Gasket 918G Metric Header Bolt means selecting a product backed by years of engineering expertise and a commitment to quality. Our manufacturing process incorporates precision forging and heat‑treatment techniques that guarantee each bolt meets exacting dimensional tolerances. The black oxide finish not only enhances aesthetic appeal but also provides a protective barrier against moisture and road salts, which are common culprits of corrosion in automotive environments. We stand behind our product with a comprehensive warranty, reflecting confidence in its durability and performance. Additionally, our customer support team is readily available to assist with technical questions, installation guidance, and after‑sales service, ensuring you receive the full value of your purchase. By investing in these bolts, you benefit from reduced maintenance intervals, improved exhaust system integrity, and the peace of mind that comes from using a component designed for longevity.

Key Features

• High‑strength carbon steel construction delivers superior durability under extreme heat and vibration.
• Black oxide coating resists corrosion, extending bolt life even in harsh road conditions.
• Compact hex head and flange design fit into tight engine bays without sacrificing strength.
• Precise M8‑1.25x25mm sizing ensures a perfect match for a wide range of header applications.
• Comprehensive customer support and warranty provide confidence and assistance throughout the product lifecycle.

FAQ

What makes the black oxide finish beneficial for exhaust bolts?

The black oxide finish creates a thin, protective layer on the steel surface that inhibits rust formation and reduces the visual impact of heat discoloration. This coating helps maintain the bolt’s structural integrity over time, especially in environments where exposure to moisture, road salts, and high temperatures is common.

Can these bolts be used on both gasoline and diesel engines?

Yes, the 918G Metric Header Bolts are compatible with both gasoline and diesel engine applications. Their material composition and heat‑treated properties are designed to handle the thermal stresses and torque requirements typical of both fuel types, making them a versatile choice for a broad range of vehicles.

How do I determine the correct torque setting for installation?

While the exact torque value can vary depending on the specific header or manifold manufacturer, a general guideline for M8 bolts of this grade is to tighten to approximately 8‑10 Nm (Newton‑meters). Always refer to the vehicle or component service manual for the precise torque specification to avoid over‑tightening or under‑tightening.

Is the set suitable for high‑performance racing applications?

Absolutely. The combination of high‑strength carbon steel, precise machining, and corrosion‑resistant coating makes these bolts well‑suited for high‑performance and racing scenarios where reliability and weight savings are critical. The compact design also helps reduce overall engine bay clutter, which is advantageous in competitive environments.

What warranty does Mr Gasket provide for this product?

Mr Gasket offers a limited warranty that covers manufacturing defects and material failures for a period of one year from the date of purchase. Should any issue arise within this timeframe, customers can contact our support team for a replacement or refund, subject to proof of purchase and compliance with warranty terms.