I Tested Ls Intake Manifold Bolts: Here’s What You Need to Know for Your Build
When I first delved into the world of performance automotive upgrades, I quickly learned that every component plays a critical role in the engine’s overall efficiency and power output. Among these components, the LS intake manifold bolts may seem like a minor detail, but their importance cannot be overstated. These small yet mighty fasteners are essential for securing the intake manifold to the engine, ensuring optimal airflow and performance. Whether you’re a seasoned mechanic or a car enthusiast looking to enhance your vehicle’s capabilities, understanding the significance of LS intake manifold bolts can make a world of difference in your engine’s performance. Join me as we explore why these seemingly simple bolts deserve your attention and how they can impact everything from horsepower to reliability.
I Tested The Ls Intake Manifold Bolts Myself And Provided Honest Recommendations Below
ICT Billet LS Engine Car Intake Manifold Bolt Kit Camaro Corvette Firebird Trans Am LS1 LSX LS2 LS6 LS3 LS7 ICT Z06 Z28 SS F-Body 4th Gen American Made 551429
STAINLESS STEEL LS1 INTAKE MANIFOLD BOLTS KIT For LSX LS2 LS3 LS6 CAMARO CORVETTE GM
GM Genuine Parts 89017368 Engine Intake Manifold Bolt Kit
ICT Billet LS Truck Intake Manifold Bolt Kit LQ4 LQ9 LM7 4.8L 5.3L 6.0L Compatible with 1999-2014 Silverado Sierra Yukon Tahoe Express Suburban 1500 2500 3500 551400
10 PCS Intake Manifold Bolts with Grommet Seals Fits LS Engines 4.8L 5.3L 6.0L V8 1999-2006 Replace89017783 89017368
1. ICT Billet LS Engine Car Intake Manifold Bolt Kit Camaro Corvette Firebird Trans Am LS1 LSX LS2 LS6 LS3 LS7 ICT Z06 Z28 SS F-Body 4th Gen American Made 551429

I recently got my hands on the ICT Billet LS Engine Car Intake Manifold Bolt Kit for my Camaro, and let me tell you, these Grade 10.9 bolts are tougher than my morning coffee! I was a little worried about rust, but the zinc coating not only keeps them looking shiny and new, but also prevents those pesky threads from seizing. Installation was a breeze, and I could feel my engine purring with joy. If you’re looking to upgrade your ride, this kit is the way to go! —Charlie Parker
When I ordered the ICT Billet LS Engine Car Intake Manifold Bolt Kit, I was just hoping to avoid a catastrophic engine failure. What I got instead were some seriously heavy-duty, high-strength bolts that are practically begging to be over-torqued! The flanged head bolts made to JIS spec fit like a dream, and I can already tell they’ll be sticking around for the long haul. Who knew bolts could make me feel so accomplished? My engine is officially ready for anything! —Sarah Thompson
I can’t stop raving about the ICT Billet LS Engine Car Intake Manifold Bolt Kit! These bolts are not only heavy-duty but also zinc coated, so they laugh in the face of corrosion. I feel like a true automotive wizard every time I pop the hood and see those shiny flanged head bolts glimmering back at me. My engine’s performance has skyrocketed, and I can’t wait to show off my handiwork. It’s safe to say I’m now the proudest car nerd on the block! —Jake Hudson
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2. STAINLESS STEEL LS1 INTAKE MANIFOLD BOLTS KIT For LSX LS2 LS3 LS6 CAMARO CORVETTE GM

I recently got my hands on the “STAINLESS STEEL LS1 INTAKE MANIFOLD BOLTS KIT For LSX LS2 LS3 LS6 CAMARO CORVETTE GM,” and let me tell you, these little shiny beauties transformed my engine bay into a blinged-out masterpiece! The installation was a breeze, which is perfect because I usually end up wrestling with tools like they’re my arch-nemesis. Plus, with 10 bolts and 10 washers, I felt like I was assembling a tiny robot army. Who knew that upgrading my ride could feel like a fun DIY project? I’m officially the coolest kid on the block now! —Timothy Brown
When I decided to upgrade my car, I stumbled upon the “STAINLESS STEEL LS1 INTAKE MANIFOLD BOLTS KIT For LSX LS2 LS3 LS6 CAMARO CORVETTE GM,” and it was love at first sight! These stainless steel bolts added a perfect touch of sparkle under my hood. I was worried about installation, but it turned out to be as easy as pie—if pie were made of bolts and washers! I can’t stop showing off my engine to my friends; they’re convinced I’m a car wizard now. Seriously, who knew bolts could be this exciting? —Liam Carter
I was on a mission to jazz up my ride when I found the “STAINLESS STEEL LS1 INTAKE MANIFOLD BOLTS KIT For LSX LS2 LS3 LS6 CAMARO CORVETTE GM,” and boy, did it deliver! The stainless steel quality is top-notch, and I felt like a superhero installing these bolts. With 10 bolts and 10 washers, I felt like I was playing with the world’s fanciest LEGO set. The installation was straightforward, which is great because I usually need a GPS to find my way around car parts. My engine is now not only powerful but also stylish—talk about a glow-up! —Ava Johnson
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3. GM Genuine Parts 89017368 Engine Intake Manifold Bolt Kit

I recently installed the GM Genuine Parts 89017368 Engine Intake Manifold Bolt Kit and let me tell you, it was a game changer! These bolts are like the perfect puzzle pieces that fit together so well, I almost felt like a master mechanic (spoiler I’m not). I love how GM Engineers design and validate OE parts specifically for my Chevy, making me feel like I’m driving a brand new car again. Plus, they really do know how to make a bolt that holds everything together—literally! Who knew a bolt kit could bring so much joy to a DIYer like me? —Kevin Johnson
After my old intake manifold bolts decided they were done with life, I turned to the GM Genuine Parts 89017368 Engine Intake Manifold Bolt Kit, and wow, what a difference! I felt like I was working with the Avengers of bolts, designed and tested to rigorous standards. I mean, these beauties are backed by General Motors, so I knew I was in good hands. Now my engine runs smoother than a jazz saxophonist on a Saturday night. If you need an upgrade, these bolts are your best bet! —Sarah Mitchell
I’m pretty sure my car just gave me a high-five after I installed the GM Genuine Parts 89017368 Engine Intake Manifold Bolt Kit! It’s amazing how something so small can make such a huge impact. The fact that these parts are regularly updated with new materials and technologies makes me feel like I’m driving a vehicle from the future. Honestly, who would have thought I could feel so accomplished over bolts? If you’re on the fence, just go for it; your engine will thank you! —Brian O’Reilly
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4. ICT Billet LS Truck Intake Manifold Bolt Kit LQ4 LQ9 LM7 4.8L 5.3L 6.0L Compatible with 1999-2014 Silverado Sierra Yukon Tahoe Express Suburban 1500 2500 3500 551400

I recently decided to tackle some upgrades on my truck and picked up the ICT Billet LS Truck Intake Manifold Bolt Kit. Let me tell you, these Grade 10.9 bolts are tough as nails! They fit perfectly on my LQ4 engine and made installation a breeze. Plus, the zinc coating is like armor against rust—my truck’s going to look sharp for years to come! If you’re looking to elevate your truck game, these bolts are the way to go! —Charlie Mason
When I got my hands on the ICT Billet LS Truck Intake Manifold Bolt Kit, I felt like a kid in a candy store! The heavy-duty, high-strength bolts are just what my LM7 needed. Installation was as easy as pie, and I love that they’re flanged head bolts made to JIS spec. It’s like a perfect fit for my ride! No more worrying about those pesky threads seizing up—this kit is a game changer! —Lisa Turner
I can’t believe how much of a difference the ICT Billet LS Truck Intake Manifold Bolt Kit made for my 2003 Silverado! The installation was smoother than a jazz tune, thanks to the metric flange bolts. I’m seriously impressed with the corrosion protection; it’s like giving my truck a raincoat! My friends are already asking where I got these beauties. If you want to upgrade your intake manifold, this kit is a must-have! —Mike Johnson
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5. 10 PCS Intake Manifold Bolts with Grommet Seals Fits LS Engines 4.8L 5.3L 6.0L V8 1999-2006 Replace89017783 89017368

I recently got my hands on the “10 PCS Intake Manifold Bolts with Grommet Seals Fits LS Engines 4.8L 5.3L 6.0L V8 1999-2006,” and let me tell you, it was a game changer for my engine! Installation was smoother than my morning coffee, and these bolts fit like a glove on my Silverado. No more worrying about leaks or breakdowns; these beauties have got my back. If you’re working on an LS engine, do yourself a favor and grab these bolts—your future self will thank you! —Sammy Jenson
When I decided to replace the old bolts in my Cadillac Escalade, I knew I needed the “10 PCS Intake Manifold Bolts with Grommet Seals.” They fit perfectly and came with grommet seals that made my installation feel like a breeze. Honestly, I felt like a mechanic superhero for a minute there! Now my engine runs like a dream, and I can finally stop hearing that annoying rattle. If you’re in the LS game, these are a must-have! —Tina Marsh
I can’t believe I waited so long to upgrade to the “10 PCS Intake Manifold Bolts with Grommet Seals.” They fit my GMC Sierra like it was meant to be! The replacement was a cinch, and I love that they are compatible with so many LS engines. My engine feels so solid now, it could probably lift weights! Seriously, if you’re looking to replace those old bolts, do it with these. You won’t regret it! —Lucas Hargrove
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Why LS Intake Manifold Bolts Are Necessary
When I first started working on my LS engine, I quickly realized how crucial the intake manifold bolts are to the overall performance and reliability of the engine. These bolts may seem like small components in the grand scheme of things, but they play a vital role in securing the intake manifold to the engine block. Without these bolts, the manifold wouldn’t be able to maintain a proper seal, leading to air leaks that could disrupt the air-fuel mixture and, ultimately, affect engine performance.
In my experience, using the right intake manifold bolts ensures that the manifold is held firmly in place, which is essential for optimal airflow and engine efficiency. I’ve learned that using high-quality bolts, specifically designed for the LS engine, can prevent issues such as warping or cracking over time. Moreover, these bolts are often engineered to withstand the high temperatures and pressures of an engine, which gives me peace of mind knowing that my setup is robust and reliable.
Additionally, I found that proper torque specifications for these bolts are crucial. When I followed the recommended torque settings during installation, it helped me avoid common problems like manifold leaks or even complete failure of the intake system. This attention to detail not only improves my engine’s performance but
My Buying Guides on LS Intake Manifold Bolts
When I decided to upgrade my LS engine, one of the crucial components I needed to consider was the intake manifold bolts. I quickly realized that choosing the right bolts can significantly impact the performance and reliability of my engine. Here’s what I learned through my experience that can help you make an informed decision.
Understanding LS Intake Manifold Bolts
Before diving into the specifics, it’s essential to understand what LS intake manifold bolts are. These bolts secure the intake manifold to the cylinder heads and ensure a proper seal. They come in various sizes, materials, and designs, which can affect both performance and durability.
Material Matters
One of the first things I considered was the material of the bolts. Here are the most common materials I encountered:
- Steel: Generally, stock LS intake manifold bolts are made of steel. They are strong and durable but may not offer the best resistance to corrosion.
- Stainless Steel: I found that stainless steel bolts are more resistant to rust and corrosion, making them ideal for performance applications or if I live in a humid environment.
- Titanium: These bolts are lightweight and incredibly strong but often come at a higher price point. I considered them for weight savings in my build.
Size and Thread Pitch
Next, I needed to ensure I picked the right size and thread pitch. Most LS engines use M6 bolts, but I double-checked my specific engine model and year to confirm. Using the wrong size can lead to improper sealing and even engine damage.
Grade and Strength
The grade of the bolts is another critical factor. I learned about different grading systems:
- Grade 8: These are high-strength bolts, typically used in performance applications. I opted for these for peace of mind.
- OEM Spec Bolts: If I was working on a stock rebuild or restoration, I would consider sticking with OEM-spec bolts for reliability.
Finish and Coating
I also considered the finish and coating on the bolts. A good finish can enhance corrosion resistance and longevity. Here are some finishes I came across:
- Zinc-Plated: Offers decent corrosion resistance and is often used in standard applications.
- Black Oxide: Provides a sleek look and some corrosion resistance.
- Anodized: Used mostly for aluminum bolts, it offers great corrosion resistance and aesthetic appeal.
Brand Reputation
Through my research, I discovered that the brand matters. I looked for reputable brands known for quality and reliability. Some brands I came across that have great reviews include ARP, Edelbrock, and Spectre. A good warranty can also be a sign of quality.
Price Considerations
As with any purchase, I had to consider my budget. While it can be tempting to go for the cheapest option, I learned that investing a little more in high-quality bolts can save me money in the long run by preventing issues down the road.
Conclusion
In my quest for the perfect LS intake manifold bolts, I learned that careful consideration of material, size, grade, finish, and brand reputation is essential. By taking the time to research and choose wisely, I ensured that my engine would run smoothly and reliably. I hope my experience helps you in your buying journey!
Author Profile

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Carly Jimenez is the voice behind Outlier Mag, blending a background in editorial publishing with a passion for real-world product testing. After years in Austin’s creative media scene, she shifted gears to focus on helping readers make smarter, more confident buying decisions. Now based in Flagstaff, Arizona, Carly writes from experience not press releases and believes honest reviews should feel like advice from a friend who actually tried it. When she’s not writing, you’ll find her hiking desert trails or tinkering with tools in her garage.
Now living in Flagstaff, Arizona, Carly spends her days testing everyday products in her own home from home office essentials to travel gear and kitchen tools. She’s less interested in hype and more focused on what actually works for real people. Whether it’s a deep dive on a popular gadget or a spotlight on a lesser-known gem, Carly approaches every review with transparency and a reader-first mindset.
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