Looking for the best replacement main caps for your engine rebuild? We offer high-quality, durable main caps that ensure a perfect fit and reliable performance for your GM LS engine.
When it comes to engine rebuilds, choosing the best replacement main caps is key. These parts hold your engine’s main bearings securely, ensuring smooth and reliable operation.
Many GM LS engine owners trust high-quality main caps for durability and perfect fit. Whether you drive a Chevy or Pontiac, having the right bolts and caps makes all the difference.
Easy to install. Built to last. Designed for peak performance. Discover how the right main caps can transform your engine rebuild experience.
List of Top 10 Replacement Main Caps
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Main Cap Bolt kit Compatible with 2000-15 GM LS1 LS2 LS6 LS7 LS9 Engines 12560273 12560272 12556127 |
This Main Cap Bolt Kit is perfect for car owners who need reliable replacement parts for their GM LS engines. It’s ideal for DIY repairs or professional mechanics working on Chevy or Pontiac vehicles from 1997 to 2015. |
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King Rod & Main Bearings Kit Plus LS Rod & Main Cap Bolts Compatible with 1997-2015 Chevy 4.8 4.8L 5.3 5.3L 5.7 5.7L LS1 LS6 |
This King Rod & Main Bearings Kit Plus LS Rod & Main Cap Bolts is perfect for car enthusiasts and mechanics working on Chevy engines from 1997 to 2015. It fits 4.8L, 5.3L, and 5.7L LS1 & LS6 models. If you want strong, reliable parts that match your engine’s needs, this kit is made for you. |
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LS Main Cap Bolt Set Compatible with 2014-2020 GM 5.3L & 6.2L Gen V Direct Injected Engines 11548075 11548076 11546565 |
This product is perfect for owners of 2014-2020 GM 5.3L & 6.2L Gen V direct injected engines needing OEM replacements for main cap bolts. It includes inner, outer, and side bolts to ensure proper engine repair and reliability. |
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CKPSMS Brand – 1SET Small &Large Spool Cap & Main Auxiliary Spool Pin Compatible with/Replacement for Singer Brand 3221 Simple,3223,3229, 3232 Simple,4423,4432,5511,5523,5532,5554,8275,8770,9340 |
This product is perfect for Singer sewing machine owners needing reliable replacements. It fits select Singer models and includes a complete set for easy spool cap and pin swaps. Great for fixing worn parts or upgrading your setup for trouble-free sewing. |
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Replacement Caps For 5 Gallon Plastic Hedpack – 1 Large Cap And 1 Small Cap |
This product is perfect for anyone who needs to replace caps for their 5-gallon plastic Hedpack. It includes one large cap and one small cap, making it easy to keep your container secure. |
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Speedmaster PCE289.1001 Compatible with Chevy SBC 350 OEM 4 Bolt Replacement Billet Steel Main Caps (Middle 3 Caps) |
This product is perfect for Chevy SBC 350 owners who need a reliable and durable replacement for their main caps. It’s ideal for those who value quality and performance. |
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Cobra-Tek Main Cap Stud Fits 351W 1969-2021 Production Blocks |
This product is perfect for car enthusiasts and mechanics working on 351W engines from 1969-2021. It offers a durable, reliable solution for repairs or daily use with exact fit and trusted performance. |
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ZhXu Shuo 5 Pcs Spool Pin Cap Set – Main & Auxiliary Replacement Spool Cap & Spool Pin Fits for Singer Sewing Machine 3223 3232 3321 3323 4423 4432 8275 and More Models |
This ZhXu Shuo 5 Pcs Spool Pin Cap Set is perfect for anyone who owns a Singer sewing machine and wants to keep their machine running smoothly. If you need easy-to-install, reliable replacement parts that hold your thread steady and prevent tangles, this set is made just for you. It’s ideal for sewing enthusiasts and professionals who want to maintain their machine’s performance without hassle. |
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ARP 156-5002 Main Cap Side Bolt Kit for Ford M9 Modular Block |
This ARP 156-5002 Main Cap Side Bolt Kit is perfect for Ford Modular engine builders who need stronger engine parts. It fits 4 Bolt Main Ford Modular engines and uses vehicle-specific design for a secure hold. |
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ARP 156-5001 Main Cap Side Bolt Kit for Ford M8 Modular Block |
This ARP Main Cap Side Bolt Kit is perfect for Ford M8 Modular Block owners who want reliable, high-quality bolts. It’s ideal for anyone upgrading or repairing their engine. |
Detailed Reviews
Finding the perfect replacement main caps can make or break your engine’s performance. Our top picks are precision-engineered, durable, and built for easy installation—ensuring a flawless fit for GM LS, Ford Modular, and Chevy SBC engines. Whether you’re rebuilding or upgrading, these top-rated kits deliver unmatched strength and reliability. Dive into our guide to discover the best match for your build.
1. Main Cap Bolt kit Compatible with 2000-15 GM LS1 LS2 LS6 LS7 LS9 Engines 12560273 12560272 12556127
Main Cap Bolt Kit is a must-have for GM LS engine owners. It includes 10 inner main bolts, 10 outer main bolts, and 10 main cap side bolts, all designed to replace OEM parts.
This kit is compatible with Chevy and Pontiac engines from 1997-2015. It works with 4.8L, 5.3L, and 5.7L engines. Easy installation and reliable performance make this kit a great choice.
| Pros | Cons |
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Perfect For:
This Main Cap Bolt Kit is perfect for car owners who need reliable replacement parts for their GM LS engines. It’s ideal for DIY repairs or professional mechanics working on Chevy or Pontiac vehicles from 1997 to 2015.
Ready to Purchase?
2. King Rod & Main Bearings Kit Plus LS Rod & Main Cap Bolts Compatible with 1997-2015 Chevy 4.8 4.8L 5.3 5.3L 5.7 5.7L LS1 LS6
The King Rod & Main Bearings Kit is a perfect fit for Chevy engines from 1997 to 2015. It works with 4.8L, 5.3L, and 5.7L LS1 & LS6 models. This kit includes all essential bolts for a smooth engine rebuild.
It comes with 10 inner main bolts, replacing OEM 11570662. Also included are 10 main cap side bolts, which replace OEM 12556127. These parts ensure strong and reliable performance.
The kit also has 10 outer main bolts for the windage tray, replacing OEM 12560273. All parts are designed for durability and easy installation. Upgrade your engine with this complete and compatible kit.
| Pros | Cons |
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Perfect For:
This King Rod & Main Bearings Kit Plus LS Rod & Main Cap Bolts is perfect for car enthusiasts and mechanics working on Chevy engines from 1997 to 2015. It fits 4.8L, 5.3L, and 5.7L LS1 & LS6 models. If you want strong, reliable parts that match your engine’s needs, this kit is made for you.
Ready to Purchase?
3. LS Main Cap Bolt Set Compatible with 2014-2020 GM 5.3L & 6.2L Gen V Direct Injected Engines 11548075 11548076 11546565
Upgrade your engine with the LS Main Cap Bolt Set. It fits 2014-2020 GM 5.3L and 6.2L Gen V engines. These bolts are made to last and match OEM parts perfectly.
The set includes 10 inner main bolts, 10 outer main bolts, and 10 main cap side bolts. Each piece is built for strength and perfect fit.
| Pros | Cons |
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Perfect For:
This product is perfect for owners of 2014-2020 GM 5.3L & 6.2L Gen V direct injected engines needing OEM replacements for main cap bolts. It includes inner, outer, and side bolts to ensure proper engine repair and reliability.
Ready to Purchase?
4. CKPSMS Brand – 1SET Small &Large Spool Cap & Main Auxiliary Spool Pin Compatible with/Replacement for Singer Brand 3221 Simple,3223,3229, 3232 Simple,4423,4432,5511,5523,5532,5554,8275,8770,9340
This CKPSMS spool cap and pin set includes small and large spool caps plus main and auxiliary spool pins. It works as a replacement for Singer sewing machines, fitting over 40 models like 3221 Simple, 4423, 5511, and more.
Secure fit. Smooth thread feeding. Easy install. These parts help your sewing machine run without snags or jams. Perfect for keeping your Singer machine in top shape.
| Pros | Cons |
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Perfect For:
This product is perfect for Singer sewing machine owners needing reliable replacements. It fits select Singer models and includes a complete set for easy spool cap and pin swaps. Great for fixing worn parts or upgrading your setup for trouble-free sewing.
Ready to Purchase?
5. Replacement Caps For 5 Gallon Plastic Hedpack – 1 Large Cap And 1 Small Cap
These Replacement Caps fit 5 Gallon Plastic Hedpack containers. They include 1 Large Cap and 1 Small Cap for easy use.
The Large Cap seals big openings. The Small Cap fits smaller ones. Both keep liquids secure and spill-free.
These caps are durable and simple to attach. They ensure a secure fit for your Hedpack needs.
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Perfect For:
This product is perfect for anyone who needs to replace caps for their 5-gallon plastic Hedpack. It includes one large cap and one small cap, making it easy to keep your container secure.
Ready to Purchase?
6. Speedmaster PCE289.1001 Compatible with Chevy SBC 350 OEM 4 Bolt Replacement Billet Steel Main Caps (Middle 3 Caps)
Speedmaster PCE289.1001 is a high-quality replacement for Chevy SBC 350 engines. It includes three middle billet steel main caps, designed for durability and strength.
These main caps are track proven, tested for longevity in road, race, and recreation. They bring reliability to your engine, ensuring peak performance.
Speedmaster offers a 12-month limited worldwide warranty, giving you peace of mind. Their unique blend of old and new technology sets them apart in innovation and quality.
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Perfect For:
This product is perfect for Chevy SBC 350 owners who need a reliable and durable replacement for their main caps. It’s ideal for those who value quality and performance.
Ready to Purchase?
7. Cobra-Tek Main Cap Stud Fits 351W 1969-2021 Production Blocks
The Cobra-Tek Main Cap Stud is made to fit 351W 1969-2021 production blocks perfectly. It meets or exceeds all original equipment specifications for reliable use.
This stud offers unsurpassed quality. You can trust it. It is tested for fit, form, and function.
Built for repair and daily use, the stud holds up well. You get great value and lasting performance every time.
| Pros | Cons |
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Perfect For:
This product is perfect for car enthusiasts and mechanics working on 351W engines from 1969-2021. It offers a durable, reliable solution for repairs or daily use with exact fit and trusted performance.
Ready to Purchase?
8. ZhXu Shuo 5 Pcs Spool Pin Cap Set – Main & Auxiliary Replacement Spool Cap & Spool Pin Fits for Singer Sewing Machine 3223 3232 3321 3323 4423 4432 8275 and More Models
The ZhXu Shuo 5 Pcs Spool Pin Cap Set is a must-have for Singer sewing machine owners. It includes 5 essential pieces to keep your machine running smoothly.
This set features spool caps and pins that fit multiple Singer models. They hold thread in place and prevent tangles while you sew.
Easy to use, durable, and compatible with many machines. Perfect for sewing enthusiasts and professionals alike.
| Pros | Cons |
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Perfect For:
This ZhXu Shuo 5 Pcs Spool Pin Cap Set is perfect for anyone who owns a Singer sewing machine and wants to keep their machine running smoothly. If you need easy-to-install, reliable replacement parts that hold your thread steady and prevent tangles, this set is made just for you. It’s ideal for sewing enthusiasts and professionals who want to maintain their machine’s performance without hassle.
Ready to Purchase?
9. ARP 156-5002 Main Cap Side Bolt Kit for Ford M9 Modular Block
ARP 156-5002 Main Cap Side Bolt Kit fits Ford Modular engines. It includes 4 Bolt Main fasteners for secure installation. This kit is precision-engineered for durability.
Part number 156-5002 ensures exact fit and function. The lightweight design (0.9 pounds) makes it easy to handle.
Vehicle-specific fit guarantees reliable performance. These bolts are built to match Ford M9 Modular Blocks perfectly.
| Pros | Cons |
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Perfect For:
This ARP 156-5002 Main Cap Side Bolt Kit is perfect for Ford Modular engine builders who need stronger engine parts. It fits 4 Bolt Main Ford Modular engines and uses vehicle-specific design for a secure hold.
Ready to Purchase?
10. ARP 156-5001 Main Cap Side Bolt Kit for Ford M8 Modular Block
The ARP 156-5001 Main Cap Side Bolt Kit is built for the Ford M8 Modular Block. It ensures a strong and secure fit with high-quality main bolts.
This kit fits perfectly with your Ford Modular engine. It weighs only 0.8 pounds. The parts match the OEM number 156-5001 exactly.
| Pros | Cons |
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Perfect For:
This ARP Main Cap Side Bolt Kit is perfect for Ford M8 Modular Block owners who want reliable, high-quality bolts. It’s ideal for anyone upgrading or repairing their engine.
Ready to Purchase?
Buying Guide
Choosing the best replacement main caps is key to a smooth engine rebuild. These parts keep your engine running strong and reliable.
Engaging Experience:
Imagine your engine purring like new after a rebuild. The right main caps make this possible, ensuring durability and perfect fit.
Factors to Consider When Buying:
– Compatibility: Check if the caps fit your engine model and year. Wrong parts can cause issues.
– Material Quality: Look for durable materials like billet steel for long-lasting performance.
– Ease of Installation: Choose caps that are easy to install to save time and effort.
– OEM Replacement: Opt for parts that match OEM specifications for a perfect fit.
– Brand Reputation: Trust trusted brands known for quality and reliability.
– Warranty: A good warranty gives peace of mind and shows the brand’s confidence.
– Price vs. Value: Balance cost with quality to get the best value for your money.