Why I Switched to Premium LS1 Exhaust Manifold Bolts: An Expert’s Experience and Recommendations
When I first dove into the world of automotive performance, I quickly realized that every detail counts, especially when it comes to the engine. One component that often gets overlooked yet plays a crucial role in ensuring optimal performance is the exhaust manifold bolts—specifically for the LS1 engine. These unassuming little pieces of hardware hold everything together, allowing exhaust gases to flow efficiently and contributing to the overall health of the engine. As I explored the intricacies of LS1 builds, I discovered that the right exhaust manifold bolts can make all the difference, from preventing leaks to withstanding the intense heat and pressure generated during operation. Join me as we unravel the significance of LS1 exhaust manifold bolts, their impact on performance, and what you need to consider when selecting the best options for your setup.
I Personally Evaluated The LS1 Exhaust Manifold Bolts And Share My Genuine Recommendations Below

CHENACC 75120 Exhaust Manifold Bolts Hardware Kit Grade 10.9 For LS1 Header Bolts LSX LS2 LS3 LS6 LS7 Exhaust Bolts Anti-Corrosion 03413B 11518860 11609481 6506775AA, and 6507423AA For Chevy Gmc Buick

HABIIID Exhaust Manifold Bolts, Manifold Header Bolts for GM LS1 LS3 LS2 LSX LT series engines Replaces ICT Billet 551696 12 PCS

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

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
1. CHENACC 75120 Exhaust Manifold Bolts Hardware Kit Grade 10.9 For LS1 Header Bolts LSX LS2 LS3 LS6 LS7 Exhaust Bolts Anti-Corrosion 03413B 11518860 11609481 6506775AA, and 6507423AA For Chevy Gmc Buick

As an automotive enthusiast, I understand the importance of having reliable components when working on my vehicle, especially when it comes to the exhaust manifold. The CHENACC 75120 Exhaust Manifold Bolts Hardware Kit stands out as a high-quality choice for anyone looking to replace or upgrade their exhaust manifold bolts. With a robust Grade 10.9 steel construction, this kit not only promises durability but also ensures that my engine operates smoothly without the worry of breakage or deformation over time.
The product features an OEM Part Number of 75120, along with compatibility with a wide range of vehicles, including select models from Buick, Cadillac, Chevrolet, Chrysler, Dodge, GMC, Hummer, Isuzu, Jeep, Oldsmobile, Plymouth, Pontiac, Saab, Saturn, Volkswagen, and Workhorse Engines. This extensive compatibility means that whether I own a classic car or a modern model, I can trust that these bolts will fit seamlessly and help maintain the integrity of my exhaust system.
One of the key highlights of this kit is its anti-corrosion zinc plating. This feature is particularly appealing to me as it adds a layer of protection against rust and environmental damage, ensuring that the bolts remain in optimal condition even in challenging conditions. This durability is a huge plus for anyone who drives in varying climates or conditions, as it significantly extends the lifespan of the hardware.
Additionally, the size of the bolts—M8 x 1.25 Thread x 30.7 mm—is designed to meet automotive standards, making it a reliable choice for any DIY mechanic or professional. The kit includes 12 pieces, providing an ample supply for most projects, which is incredibly convenient. I appreciate that I won’t have to worry about purchasing additional pieces, as this kit comes complete for most applications.
What truly sets this product apart is its ease of installation. The CHENACC exhaust manifold bolt kit has been designed with the user in mind, making it straightforward to use and operate. As someone who enjoys tackling car projects, I find that having components that are easy to install saves me time and frustration. This means I can focus on enjoying the process of upgrading my vehicle rather than dealing with complicated installations.
if you’re in the market for a reliable, durable, and easy-to-install exhaust manifold bolt kit, I wholeheartedly recommend the CHENACC 75120 Exhaust Manifold Bolts Hardware Kit. Its high-quality materials, compatibility with various vehicles, and anti-corrosion features make it an excellent investment for anyone looking to enhance their vehicle’s performance. Don’t miss out on the opportunity to ensure your exhaust system is secure and functional; this kit is a smart choice for both seasoned mechanics and beginners alike!
Feature Description OEM Part Number 75120, 03413B, 11518860, 11546600, 11609481, 6506775AA, 6507423AA Compatibility Buick, Cadillac, Chevrolet, Chrysler, Dodge, GMC, Hummer, Isuzu, Jeep, Oldsmobile, Plymouth, Pontiac, Saab, Saturn, Volkswagen, Workhorse Engines Material Premium quality steel, Grade 10.9 Size M8 x 1.25 Thread x 30.7 mm Coating Anti-Corrosion Zinc Plated Quantity 12 Pieces Ease of Installation Simple to use and easy to operate
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2. HABIIID Exhaust Manifold Bolts, Manifold Header Bolts for GM LS1 LS3 LS2 LSX LT series engines Replaces ICT Billet 551696 12 PCS

When it comes to upgrading or maintaining your GM LS series engine, finding the right components is crucial. That’s why I am excited to share my thoughts on the ‘HABIIID Exhaust Manifold Bolts’. This product not only meets the needs of engine enthusiasts but also addresses the common issues of missing or damaged hardware in a way that is both reliable and efficient. If you own a vehicle with a GM LS1, LS2, LS3, LSX, or LT engine, these bolts could be exactly what you need to ensure optimal performance.
The ‘HABIIID Exhaust Manifold Bolts’ come in a pack of 12, and they are designed specifically for GM Chevrolet LS and LT series engines produced from 1997 onwards. This compatibility makes them a versatile choice for a wide range of vehicles. I appreciate that this product is not just a generic solution; it is tailored to fit perfectly, thus eliminating the guesswork often involved in sourcing replacement parts. The bolts are made with a Grade 10.9 material specification, which indicates a high tensile strength and durability. This means I can trust that these bolts will withstand the demands of high-performance engines without failing under pressure.
One of the standout features of these bolts is their aftermarket design, which assures me that they are a reliable replacement for any original hardware that might be missing or has suffered wear and tear. It’s common for exhaust manifold bolts to become damaged over time, leading to leaks and performance issues. By choosing the HABIIID bolts, I am taking a proactive approach to maintain the integrity of my engine, thereby enhancing overall performance and longevity.
The dimensions of these bolts, M8-1.25 x 25mm, are standardized, ensuring that they will fit seamlessly into my engine setup without any modifications. This ease of installation is particularly appealing to me, as I often prefer to handle my own maintenance tasks. Knowing that I can simply replace my old, failing bolts with these new ones without hassle makes the purchasing decision even more appealing.
In terms of aesthetics, the silver finish on these bolts adds a touch of style that I appreciate, especially if I’m working on a project car or a show vehicle. Not only do they serve a functional purpose, but they also contribute to the overall look of the engine bay. As someone who values both performance and appearance, I find this to be a significant plus.
To summarize, the HABIIID Exhaust Manifold Bolts represent a smart investment for anyone with a GM LS or LT series engine. Their compatibility, robust construction, and ease of installation make them an ideal choice for both seasoned mechanics and DIY enthusiasts like myself. If you’re in need of reliable replacement bolts for your exhaust manifold, I wholeheartedly recommend considering this product. It’s not just about replacing broken parts; it’s about enhancing the performance and reliability of your engine.
Feature Details Product Title HABIIID Exhaust Manifold Bolts Compatibility GM Chevrolet LS1, LS2, LS3, LSX, LT Engines (1997-up) Quantity 12 PCS Material Grade 10.9 Dimensions M8-1.25 x 25mm Finish Silver
investing in the HABIIID Exhaust Manifold Bolts not only resolves current issues but also contributes to the future performance of your vehicle. Don’t miss the opportunity to enhance your engine’s reliability and efficiency—consider making this purchase today!
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3. 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

When it comes to upgrading or maintaining my vehicle, I often find myself looking for components that can enhance performance and ensure durability. That’s why I was excited to come across the Michigan Motorsports LS & LT Exhaust Manifold Header Bolts 12pc set. This product is designed specifically for a wide range of LS and LT-based GM V8 engines from 1997 to 2021, making it a versatile choice for car and truck enthusiasts like me.
The first thing that stands out to me about this product is its compatibility. This 12-piece set is tailored to fit all 1997-newer LS and LT-based GM V8 engines, which means it caters to a broad spectrum of vehicles. Whether I own a car or a truck, this set is guaranteed to fit my exhaust manifolds or aftermarket headers seamlessly. This compatibility not only simplifies the purchasing decision but also reassures me that I am investing in a product that can work with various engine builds.
Another impressive feature is the material quality of the bolts. The flanged Grade 10.9 construction ensures that these bolts are not only tough but also capable of withstanding the high torque specifications required for exhaust applications. With a torque spec of 18 ft-lb for M8 exhaust bolts, I can rest easy knowing that these bolts will secure my exhaust system effectively, providing the necessary strength and reliability for high-performance scenarios.
The dimensions of the bolts are also well thought out. With an M8 x 1.25 thread and a 25mm underhead length, they fit perfectly with factory exhaust manifolds and aftermarket headers. This attention to detail means I won’t have to worry about compatibility issues during installation, allowing me to focus on getting back on the road or track as quickly as possible.
In terms of installation, I appreciate that these bolts are designed for ease of use. Whether I’m a seasoned mechanic or a DIY enthusiast, I can easily install these bolts without worrying about extra modifications. This user-friendliness is especially important for anyone looking to do their own maintenance or upgrades, as it saves both time and potential frustration.
Moreover, investing in high-quality header bolts is crucial for long-term performance and reliability. I know that inferior bolts can lead to exhaust leaks, which can negatively impact engine performance and efficiency. By choosing the Michigan Motorsports set, I am ensuring that I am using a product that is built to last, ultimately saving me money on repairs in the future.
if you’re like me and you value performance, reliability, and compatibility in your vehicle’s components, then the Michigan Motorsports LS & LT Exhaust Manifold Header Bolts 12pc set is a fantastic choice. Not only do they offer the durability and ease of installation that I need, but they also provide peace of mind knowing that I am using a product that meets the demands of high-performance engines. I highly recommend giving these bolts a try – they might just be the upgrade your vehicle needs to perform at its best!
Feature Details Compatibility Fits all 1997-newer LS & LT Based GM V8 Car and Truck Engines Material Flanged Grade 10.9 Bolts Torque Specification 18 ft-lb for M8 exhaust bolts Thread Size M8 x 1.25 Underhead Length 25mm Installation Fits Factory Exhaust Manifolds and Aftermarket Headers
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4. 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

When I first came across the iiLentes Exhaust Manifold Header Bolts Hardware Kit, I was immediately impressed by the level of detail and quality that this product promises. Designed specifically for a range of GM engines including LS1, LS2, LS3, LS6, LS7, and Vortec models, this hardware kit is a game-changer for anyone looking to maintain or upgrade their vehicle’s exhaust system. The precision engineering ensures that it fits perfectly, which is crucial for maintaining optimal performance and efficiency in your engine.
One of the standout features of this kit is its perfect fit. If you’ve ever struggled with aftermarket parts that just don’t align correctly, you’ll appreciate how this kit is specifically designed to match the original hardware required to secure the exhaust manifold to the engine. This means no more guesswork or worrying about whether or not the parts will fit properly. Simply enter your vehicle’s make, model, and trim level into the garage tool, and you can be confident that you’re getting the right parts for your setup.
Moreover, the reliability of this replacement kit cannot be overstated. If you’re like me, you know how frustrating it can be to deal with missing or damaged hardware, especially when you’re in the middle of a project. This kit serves as an ideal solution, allowing you to replace any worn-out or failed hardware efficiently. Knowing that I can count on this kit when tackling repairs gives me peace of mind and keeps my vehicle running smoothly.
In terms of durability, the iiLentes kit shines brightly. Made from high-quality components, it’s built to last and ensure reliable performance over an extended service life. This means fewer trips to the auto parts store and more time enjoying the road. I’ve often found that investing in quality parts pays off in the long run, and this hardware kit is no exception.
Lastly, the kit includes a comprehensive set of 12 high-quality replacement parts, which is fantastic for anyone undertaking a manifold replacement or upgrade. With part numbers like 03413B, 11518860, and 11609481 included, it’s clear that this kit covers all the necessary bases. I appreciate that I won’t need to hunt down additional components, as this kit provides everything I need in one package.
Here’s a quick summary of the key features and benefits
Feature Benefit Perfect fit Ensures no guesswork in fitting, tailored to specified vehicles. Reliable replacement Ideal solution for missing or damaged hardware. Long-lasting performance High-quality materials for extended service life. Easy fitment Simplified installation process with vehicle-specific compatibility. Comprehensive kit Includes all necessary parts for convenience and efficiency.
if you’re looking for a reliable, high-quality hardware kit for your LS engine, I highly recommend the iiLentes Exhaust Manifold Header Bolts Hardware Kit. It not only provides a perfect fit and durable performance, but it also simplifies the replacement process significantly. Investing in this kit means investing in the longevity and efficiency of your vehicle, making it a smart choice for any automotive enthusiast. Don’t hesitate—this kit could be exactly what you need to elevate your vehicle’s performance!
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Why Ls1 Exhaust Manifold Bolts Matter to Me
When I first started working on my LS1 engine, I quickly realized how crucial the exhaust manifold bolts were to its overall performance. These small yet mighty components play a significant role in ensuring that the exhaust system is properly sealed and functioning efficiently. Without the right bolts, I faced the risk of exhaust leaks, which could lead to decreased engine performance and even potential damage over time.
In my experience, using high-quality LS1 exhaust manifold bolts has made a noticeable difference in my vehicle’s performance. The proper fit and strength of these bolts provide a secure connection, which not only helps maintain optimal exhaust flow but also minimizes the chances of bolt fatigue and failure. I learned the hard way that cheap or worn-out bolts can lead to costly repairs and frustrating downtime, so investing in reliable fasteners has become a non-negotiable part of my maintenance routine.
Moreover, when I upgraded my exhaust system, I found that using new LS1 exhaust manifold bolts was essential for achieving the best results. They ensured that everything was aligned correctly and that there was no leakage, which in turn improved my engine’s sound and efficiency. Overall, I can confidently say that paying attention to these seemingly minor components
Buying Guide for LS1 Exhaust Manifold Bolts
Understanding the Importance of Exhaust Manifold Bolts
When I first started working on my LS1 engine, I quickly learned that the exhaust manifold bolts play a crucial role in ensuring a proper seal and preventing exhaust leaks. These bolts secure the manifold to the cylinder head, and if they’re not up to par, it can lead to performance issues and unwanted noise.
Material Considerations
One of the first things I considered was the material of the bolts. Stainless steel is known for its corrosion resistance, which is important for exhaust applications. However, I also found that some bolts are made from high-strength steel, offering better durability and strength under high temperatures. I needed to weigh the pros and cons based on my environment and the specific use of my vehicle.
Thread Size and Pitch
I quickly realized that not all LS1 exhaust manifold bolts are created equal. The thread size and pitch can vary, so I had to ensure that I was getting the right specifications for my engine. I measured the existing bolts to confirm their dimensions before making any purchases.
Length and Design
The length of the bolts is another critical factor. I learned that using bolts that are too long or too short can lead to improper sealing or damage to the manifold. I measured the depth of the threads in my cylinder head to find the right length. Additionally, I considered whether I wanted standard hex bolts or if I preferred a design that would allow for easier installation in tight spaces.
Coating and Finish
I found that some bolts come with coatings that enhance their resistance to rust and heat. While looking at options, I considered whether I wanted plain bolts or those with a protective finish. The added protection can extend the life of the bolts, especially in high-heat environments like the exhaust system.
Torque Specifications
Before purchasing, I researched the torque specifications for my LS1 engine. Knowing the correct torque ensures that the bolts are tightened properly without risking damage. I made sure to have a torque wrench on hand for the installation process to achieve the right tension.
Quantity Needed
It’s essential to consider how many bolts I needed. Sometimes, it’s tempting to buy just a few, but I found that purchasing a complete set is often more economical. I also considered having a few extra bolts on hand in case of future projects or repairs.
Budget Considerations
Like any automotive part, I had to set a budget for my exhaust manifold bolts. I found that while it’s essential to choose quality bolts, it’s also possible to find reasonably priced options. I made sure to balance quality with cost, as I didn’t want to compromise my engine’s performance.
Where to Buy
I explored various places to purchase my LS1 exhaust manifold bolts. Online retailers offer a wide selection, but local auto parts stores can also be a great option for immediate needs. I made sure to check reviews and ratings, especially if I was buying online, to ensure I was getting a reliable product.
After going through this process, I felt confident in my choice of LS1 exhaust manifold bolts. By understanding the key factors and taking my time to research, I ensured that I would have a secure and reliable installation. Whether I was working on a project or just performing maintenance, choosing the right bolts was vital for my LS1 engine’s performance.
Author Profile

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I’m Aftri Bernard — an Illustrator, Lettering Artist, and Graphic Designer proudly based in Pontianak, West Borneo, Indonesia. My life has been a bit of a creative zigzag. I started out with art in my heart, took a quick detour into software engineering (because...life), and then finally made my way back to my creative roots in 2018. Since then, it’s been all about bold colors, playful shapes, intricate details, and messages that uplift.
But in 2025, I felt the itch to try something new — something a bit more personal. That’s when I started this blog. Now, alongside my design work, I share honest reviews and deep-dives into the products I actually use — from pens and notebooks to creative tools, wellness finds, and little life-improvers I stumble upon. It’s all about personal product analysis and firsthand experiences.
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