Best Exhaust Header Bolts of 2025

Robert Reyes Avatar
Robert Reyes
Last Updated: Jan 5, 2025

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Exhaust header bolts are an essential component of any high-performance exhaust system. These bolts are designed to securely fasten the exhaust headers to the engine block, ensuring a tight seal and preventing any leaks or vibrations. Made from high-quality materials such as stainless steel or titanium, these bolts are built to withstand extreme temperatures and the constant expansion and contraction of the exhaust system. With a range of sizes and styles available, there is an exhaust header bolt to fit any make or model of vehicle. Whether you're a professional mechanic or a DIY enthusiast, investing in high-quality exhaust header bolts is crucial for achieving optimal performance and longevity from your exhaust system.

At a Glance: Our Top Picks

ARP 1001110 Header Bolts Kit Cover #TOP 1
ARP 1001110 Header Bolts Kit
ftb score rating icon 9.9
SBC Stainless Steel Exhaust Header Bolt Kit Cover #TOP 2
SBC Stainless Steel Exhaust Header Bolt Kit
ftb score rating icon 9.8
ARP 134-1202 Chromoly Header Bolt Kits Cover #TOP 3
ARP 134-1202 Chromoly Header Bolt Kits
ftb score rating icon 9.6

Top 10 Exhaust Header Bolts

ARP 1001110 Header Bolts Kit

ARP
100-1110
black
ARP 1001110 Header Bolts Kit Cover
ARP 100-1110 1001110 Header Bolts With Hex Style Heads, Chrome Moly Steel With Black Oxide Finish, Set Of 16

ARP 1001110 Header Bolts Kit is a premium grade bolt kit designed to help you install exhaust headers effortlessly. With 170,000 PSI strength rating, these bolts are considerably stronger than Grade 8 hardware. Plus, the 3/8” diameter and 1.000 under head length of the bolts make them a perfect fit for exhaust headers. Made from black oxide finished chrome moly steel, the traditional hex style heads of the bolts provide easy maneuverability. The package includes 16 pieces of bolts and premium-quality washers.

What We Like
Premium grade bolt kit
170,000 PSI strength rating is considerably stronger than Grade 8 hardware
3/8” diameter and 1.000 under head length of the bolts make them a perfect fit for exhaust headers
#TOP 2

SBC Stainless Steel Exhaust Header Bolt Kit

F.S.P
99447820
SBC Stainless Steel Exhaust Header Bolt Kit Cover
SBC Stainless Steel Exhaust Header Bolt Kit 1” 3/8-16 Bolts Compatible with Chevrolet V8 Small Blocks 265 283 305 327 350 383 400 Gen I & II 92-97 LT1 LT4 TPI TBI 96-98 Vortec 5.0L 5.7L BOP

The F.S.P Exhaust Header Bolts are designed to fit a wide range of Chevrolet V8 small block engines from 1955 to 1998. They are compatible with exhaust headers that have flanges up to ½” thick, ensuring a secure fit for your performance needs. Additionally, these bolts are suitable for Pontiac, Buick, and Oldsmobile V8 engines as well. Made from high-grade 18-8 stainless steel, they resist rust and corrosion, offering durability that chrome or steel options can't match. You’ll find that these bolts use a standard 5/16” Allen wrench, making installation straightforward and hassle-free.

What We Like
Rust and corrosion resistant
Compatible with multiple engines
Easy installation
Durable stainless steel material
#TOP 3

ARP 134-1202 Chromoly Header Bolt Kits

ARP
134-1202
Black
ARP 134-1202 Chromoly Header Bolt Kits Cover
ARP 134-1202 Chromoly Header Bolt Kits, Chevrolet Gen III/LS Series, 3/8˝ wide

The ARP 134-1202 Chromoly Header Bolt Kits for Chevrolet Gen III/LS Series features black oxide finish, steel material, and bolt style. It is designed for exhaust header bolts.

What We Like
Durable chromoly construction
Corrosion-resistant black oxide finish
Easy to install bolt style
#TOP 4

Trans-Dapt 4900 5/16" Header Bolt

Trans-Dapt Performance
4900
black
Trans-Dapt 4900 5/16" Header Bolt Cover
Trans-Dapt Performance TRANSDAPT 4900 5/16' Header Bolt

Trans-Dapt 4900 5/16" Header Bolt is a product type of bolts, designed for exhaust header bolts. The item package dimension is 3.2" L X 2.2" W X 1.3" H and weighs 0.35 lbs. It is made in the United States.

What We Like
Durable and sturdy
Perfectly fits for exhaust header bolts
Lightweight design
#TOP 5

iiLentes Exhaust Manifold Hardware Kit

iiLentes
BS-901-053
iiLentes Exhaust Manifold Hardware Kit Cover
iiLentes Exhaust Manifold Header Bolts Hardware Kit For LS1 HEADER BOLTS LSX LS2 LS3 LS6 LS7 GM Vortec 4.8L 5.3L 6.0L 6.2L 03413B 11518860 11609481

The iiLentes Header Bolts Kit is expertly crafted to ensure a perfect fit for your vehicle's exhaust manifold, helping you maintain optimal engine performance. If you find yourself missing or dealing with damaged hardware, this kit offers a dependable replacement that you can trust. Constructed from high-quality materials, it promises durability and long-lasting performance, so you won't have to worry about frequent replacements. Plus, fitting the kit to your vehicle is hassle-free; simply enter your vehicle's make, model, and trim level for a guaranteed match.

What We Like
Perfect fit for specific vehicles
Reliable replacement for damaged hardware
Durable, long-lasting materials
Easy vehicle compatibility check
#TOP 6

Z Whip Stainless-Steel Exhaust Header Bolt Kit

99447822
Z Whip Stainless-Steel Exhaust Header Bolt Kit Cover
Z Whip SBF BBF Stainless-Steel Exhaust Header Bolt Kit 1” 3/8-16 Bolts and Washers Compatible with Ford Small & Big Block V8 Engines 260 289 302 351W 351C 352 390 428 429 460 FE 5.0L Mustang

The Z Whip Exhaust Bolt Kit is designed for Ford Small and Big Block V8 engines, accommodating headers with flanges up to ½ inch. Made from high-grade 18-8 stainless steel, these bolts and washers resist rust and corrosion, ensuring long-lasting performance. You’ll appreciate the convenience of using a standard 5/16-inch Allen wrench or socket for installation. As a product from a manufacturer with aerospace certification, you can trust that the quality meets rigorous industry standards, providing you peace of mind knowing that your vehicle is equipped with reliable parts.

What We Like
Rust and corrosion resistant
High-grade stainless steel
Compatible with various Ford engines
Easy installation with standard tools
Manufactured to aerospace standards
#TOP 7

Michigan Motorsports Exhaust Manifold Bolt Set

AD141
Medium
Michigan Motorsports Exhaust Manifold Bolt Set Cover
Michigan Motorsports LS & LT Exhaust Manifold Header Bolts 12pc -Fits 1997-2021 LS1 LT1 4.8 5.3 5.7 6.0 6.2 7.0

The Michigan Motorsports Exhaust Bolts are designed for use with all GM LS and LT V8 engines from 1997 onwards. This 12-piece set includes flanged Grade 10.9 bolts that ensure a strong and secure fit for your exhaust manifold or aftermarket headers. With a torque specification of 18 ft-lb for M8 exhaust bolts, you can trust that these bolts will hold up under pressure. Their M8 x 1.25 thread and 25mm underhead length make installation straightforward, allowing you to get back on the road sooner.

What We Like
Compatible with various GM engines
Strong and durable materials
Easy installation process
Secure fit for exhaust systems
#TOP 8

Trans-Dapt Performance Mini Head Header Bolts

Trans-Dapt Performance
8885
Trans-Dapt Performance Mini Head Header Bolts Cover
Trans-Dapt Performance TRANSDAPT 8885 Mini Head Header Bolts

The Trans-Dapt Mini Header Bolts are designed for automotive enthusiasts who need reliable exhaust header bolts. With compact package dimensions of approximately 18.8 cm long by 11.4 cm wide, they are easy to store and handle. This product is categorized as an auto part, ensuring that it meets specific needs for vehicle maintenance. Manufactured in the United States, you can trust the quality and craftsmanship behind these bolts. With a single package quantity, it provides convenience for those looking to replace or upgrade their header bolts without unnecessary extras.

What We Like
Compact packaging
Quality American manufacturing
Single package convenience
Designed for exhaust headers
#TOP 9

Patriot H7977 Zinc Exhaust Header Bolts

Patriot
H7977
silver
Patriot H7977 Zinc Exhaust Header Bolts Cover
Patriot (H7977) 5/16-18 x 1" Zinc Plated Exhaust Header Bolt, (Pack of 12)

The Patriot Exhaust Header Bolts are designed for easy installation, making your automotive projects simpler. Measuring 5/16 in.-18 x 1 in., these bolts are the perfect size for many exhaust headers. Their zinc plating helps prevent corrosion, ensuring durability and longevity in your vehicle. With a pack of 12, you have enough bolts for multiple uses or replacements, providing great value. Whether you're a DIY enthusiast or a professional, these header bolts will help you get the job done efficiently.

What We Like
Easy installation
Corrosion-resistant zinc plating
Value pack of 12
Standard size for versatility
#TOP 10

Exhaust Manifold Bolt Kit

AIB2C-M10*1.5
Silver
One Size
Exhaust Manifold Bolt Kit Cover
Flanged Hex Head Bolts, Flange Bolts, Exhaust Manifold Bolt Kit M10X1.5-35mm 6-Pack

This Exhaust Manifold Bolt Kit is a six-pack of aftermarket 03423 hardware. The Stainless Steel construction provides strength and eliminates exhaust leaks. It includes six pieces of bolts and hex nuts, making it ideal for securing exhaust components. Please check the size before purchasing as it fits some Toyota, BMW, Lexus, and Chevrolet models.

What We Like
Stainless Steel construction provides strength
Six pieces of bolts & hex nuts included
Ideal for securing exhaust components and eliminating exhaust leaks
Buying Guide Image

Finding the Best Exhaust Header Bolts to Meet Your Car's Needs

How to Choose Exhaust Header Bolts

Introduction

Exhaust header bolts are an important component of any exhaust system, as they are responsible for securing the headers to the engine. Choosing the right bolts is crucial for ensuring that your exhaust system functions properly and lasts for a long time. In this article, we will discuss some important factors to consider when selecting exhaust header bolts.

Material

One of the most important things to consider when choosing exhaust header bolts is the material they are made from. The most common materials used for exhaust header bolts are steel and stainless steel. Steel bolts are strong and durable, but they can rust over time, which can cause them to become loose or break. Stainless steel bolts, on the other hand, are resistant to rust and corrosion, making them a better choice for long-term use.

Size

Exhaust header bolts come in a variety of sizes, so it's important to choose the right size for your engine. If the bolts are too small, they may not be able to handle the stress of the exhaust system and could break or come loose. If the bolts are too large, they may not fit properly and could cause leaks or other problems. To ensure that you choose the right size, refer to your engine's specifications or consult a mechanic.

Thread Type

Another important factor to consider when choosing exhaust header bolts is the thread type. The most common thread types for exhaust header bolts are coarse and fine. Coarse threads are stronger and more resistant to stripping, but they are also more difficult to install. Fine threads, on the other hand, are easier to install but may not be as strong. To determine the best thread type for your engine, refer to your engine's specifications or consult a mechanic.

Head Style

Exhaust header bolts are available with a variety of head styles, including hex, flange, and button. The head style you choose will depend on the design of your engine and the type of wrench you have available. Hex head bolts are the most common and are compatible with most wrenches. Flange head bolts have a wider surface area, which can provide better support for the headers. Button head bolts have a low profile, which can be useful in tight spaces.

Brand

When choosing exhaust header bolts, it's important to consider the brand. Not all brands are created equal, and some may offer higher quality bolts than others. Look for brands that have a good reputation and a proven track record of providing durable and reliable bolts. You can also read reviews from other customers to get an idea of the quality of the bolts from different brands.

Conclusion

In conclusion, choosing the right exhaust header bolts is crucial for ensuring that your exhaust system functions properly and lasts for a long time. When selecting exhaust header bolts, consider the material, size, thread type, head style, and brand to find the best option for your engine. By taking the time to research and compare different options, you can find the right exhaust header bolts to keep your engine running smoothly.

Frequently Asked Questions (FAQs)

1. What bolts should I use for exhaust?

For exhaust flanges, the usual options are 3 bolt or 2 bolt types. A recommended choice is an m10 bolt for 2 bolt flanges and an m8 bolt for 3 bolt flanges. It is important to use bolts with a grade of 8.8 tensile or higher to ensure they can be tightened without stretching or breaking.

2. How long should header bolts be?

The length of header bolts depends on the thickness of the flanges. Headers with 1/4-inch or 5/16-inch thick flanges typically use bolts with a 3/4-inch UHL (under head length), while 3/8-inch thick flanges usually require bolts with a 1-inch UHL.

3. What size are the header bolts?

The size of header bolts is 3/8-16 x 1 inch. This set usually comes with 12 bolts.

4. Can I use bolts instead of studs on exhaust manifold?

While it is possible to substitute bolts and nuts for studs and nuts on an exhaust manifold, it may not be recommended. Using studs allows for easier installation by drilling a hole straight through and using a nut and bolt.

5. Do you put Loctite on exhaust bolts?

Yes, you can use Loctite on exhaust bolts. A medium strength thread locking compound, such as the blue 243, is suitable for use on the threads of the bolts. This helps to prevent them from coming loose.

6. What is the maximum span between bolts?

The maximum spacing between bolts depends on the thickness of the parts being connected. For painted members or unpainted members not subject to corrosion, the maximum spacing is typically 24 times the thickness of the thinner part, but not exceeding 12 inches.

7. Is it OK to put anti-seize on exhaust manifold bolts?

If you are reusing exhaust manifold bolts, it is recommended to apply a metal fortified anti-seize to the bolts. However, it is generally recommended to use fresh OEM bolts for the best results when repairing or replacing the exhaust manifold.

Editor's Notes

During our exhaust header bolt research, we found 24 exhaust header bolt products and shortlisted 10 quality products. We collected and analyzed 6,608 customer reviews through our big data system to write the exhaust header bolts list. We found that most customers choose exhaust header bolts with an average price of $16.81.

The exhaust header bolts are available for purchase. We have researched hundreds of brands and picked the top brands of exhaust header bolts, including ARP, F.S.P, Trans-Dapt Performance, iiLentes, Z Whip. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.

Written by
Robert Reyes Avatar

Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.