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1991–2015 GM LS Series, Gen 3 Hemi 5.7L–6.4L, Ford 4.6L–5.4L Modular Engines
978G
Overview:
Mr. Gasket Black Oxide Header Bolts are engineered for high-performance engine applications requiring reliable and space-efficient fasteners. Designed specifically for GM LS Series engines from 1997 to 2015, Gen 3 Hemi 5.7L to 6.4L engines from 2003 and up, and Ford 4.6L to 5.4L Modular engines from 1991 onward, these bolts provide a secure and durable connection for exhaust headers. Their compact hex head and flange design make them ideal for tight header flange spaces where traditional bolts may not fit.
These header bolts are perfect for enthusiasts and professional mechanics upgrading or replacing exhaust components on popular V8 platforms, ensuring a precise fit and long-lasting performance under high-heat conditions.
Key Features:
Mr. Gasket header bolts combine strength, fitment accuracy, and corrosion resistance to meet the demands of performance exhaust systems. Key features include:
Construction & Design:
Crafted from high-quality carbon steel, these header bolts feature a black oxide coating that provides a balance of corrosion resistance and heat tolerance, essential for exhaust system components exposed to extreme temperatures. The compact hex head design allows installation in confined spaces without sacrificing torque capability, while the integrated flange ensures a secure seal and reduces the risk of header flange warping or damage during tightening.
The precise thread pitch and length are engineered to match OEM specifications for the targeted engine families, ensuring a reliable and consistent fit that maintains exhaust integrity and prevents leaks.
Installation & Fitment:
Installation is straightforward for anyone familiar with header or exhaust manifold work. The bolts are designed to fit directly into factory-style header flanges without modification. Their compact head profile allows for easier access in tight engine bays, reducing installation time and frustration. Always use proper torque specifications to avoid over-tightening and potential damage to the header flange or threads.
This set includes all the bolts needed for a complete header installation on the specified GM, Hemi, and Ford Modular engines, making it a convenient and reliable choice for performance upgrades or repairs.
What's Included:
Ideal For:
These header bolts are ideal for automotive enthusiasts, mechanics, and performance builders working on GM LS Series engines (1997–2015), Gen 3 Hemi engines (2003 and newer), and Ford Modular 4.6L and 5.4L engines (1991 and newer). Whether upgrading exhaust headers, performing engine swaps, or replacing worn fasteners, Mr. Gasket header bolts provide a durable, space-saving solution that ensures a secure and leak-free exhaust connection.
Mr. Gasket is a classic racer-focused brand known for gaskets, sealing solutions, and related engine hardware built to survive the heat and pressure of performance use. Now part of the Holley Performance family, Mr. Gasket continues to expand coverage for muscle cars and race builds—ideal when you want dependable sealing on intake, exhaust, and oil-system service or upgrades.
ETA stands for Estimated Time of Arrival. The date shown is calculated using our Available-to-Promise (ATP) system, which tracks real-time supplier commitments to determine when a product is expected to be available for delivery. Specifically, the date is calculated by adding 9 business days from the date a supplier has committed to ship the product, representing a worst-case scenario for when we can expect to receive inventory.
Please note: The ETA is an estimate, not a guarantee. While we work closely with our suppliers to keep dates as accurate as possible, delays due to shipping carriers, weather, customs, or supplier-side issues may occasionally push the actual arrival beyond the date shown. Likewise, inventory may arrive sooner than the ETA in many cases. If you would like to be notified for when this item arrives, sign up for our back in stock notifications!
978G Mr. Gasket 05-15 Chrysler 300 / 03-10 Dodge Ram 1500 Black Oxide Header Bolts. These black oxide finished carbon steel header bolts feature a compact hex head and integrated flange, ideal for tight header flange spaces. Designed for durability and corrosion resistance, they provide a secure fit on GM LS Series, Gen 3 Hemi, and Ford Modular engines. Includes seventeen M8 - 1.25 x 25mm bolts for reliable, long-lasting performance and easy installation. Perfect for enthusiasts seeking strength and style under the hood.
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1991–2015 GM LS Series, Gen 3 Hemi 5.7L–6.4L, Ford 4.6L–5.4L Modular Engines
978G
Overview:
Mr. Gasket Black Oxide Header Bolts are engineered for high-performance engine applications requiring reliable and space-efficient fasteners. Designed specifically for GM LS Series engines from 1997 to 2015, Gen 3 Hemi 5.7L to 6.4L engines from 2003 and up, and Ford 4.6L to 5.4L Modular engines from 1991 onward, these bolts provide a secure and durable connection for exhaust headers. Their compact hex head and flange design make them ideal for tight header flange spaces where traditional bolts may not fit.
These header bolts are perfect for enthusiasts and professional mechanics upgrading or replacing exhaust components on popular V8 platforms, ensuring a precise fit and long-lasting performance under high-heat conditions.
Key Features:
Mr. Gasket header bolts combine strength, fitment accuracy, and corrosion resistance to meet the demands of performance exhaust systems. Key features include:
Construction & Design:
Crafted from high-quality carbon steel, these header bolts feature a black oxide coating that provides a balance of corrosion resistance and heat tolerance, essential for exhaust system components exposed to extreme temperatures. The compact hex head design allows installation in confined spaces without sacrificing torque capability, while the integrated flange ensures a secure seal and reduces the risk of header flange warping or damage during tightening.
The precise thread pitch and length are engineered to match OEM specifications for the targeted engine families, ensuring a reliable and consistent fit that maintains exhaust integrity and prevents leaks.
Installation & Fitment:
Installation is straightforward for anyone familiar with header or exhaust manifold work. The bolts are designed to fit directly into factory-style header flanges without modification. Their compact head profile allows for easier access in tight engine bays, reducing installation time and frustration. Always use proper torque specifications to avoid over-tightening and potential damage to the header flange or threads.
This set includes all the bolts needed for a complete header installation on the specified GM, Hemi, and Ford Modular engines, making it a convenient and reliable choice for performance upgrades or repairs.
What's Included:
Ideal For:
These header bolts are ideal for automotive enthusiasts, mechanics, and performance builders working on GM LS Series engines (1997–2015), Gen 3 Hemi engines (2003 and newer), and Ford Modular 4.6L and 5.4L engines (1991 and newer). Whether upgrading exhaust headers, performing engine swaps, or replacing worn fasteners, Mr. Gasket header bolts provide a durable, space-saving solution that ensures a secure and leak-free exhaust connection.
Mr. Gasket is a classic racer-focused brand known for gaskets, sealing solutions, and related engine hardware built to survive the heat and pressure of performance use. Now part of the Holley Performance family, Mr. Gasket continues to expand coverage for muscle cars and race builds—ideal when you want dependable sealing on intake, exhaust, and oil-system service or upgrades.
Free Standard Shipping on orders over $300. Select “Free Shipping” at checkout. *Exclusions apply on oversized and freight items.
Need to return an item? We make it easy. Email us and we'll send you a free return label with instructions on how to return.
Free Standard Shipping on orders over $300. Select “Free Shipping” at checkout. *Exclusions apply on oversized and freight items.
Need to return an item? We make it easy. Email us and we'll send you a free return label with instructions on how to return.
