Best Crankshaft Main Bearings for Smooth Engine Power

Are you looking for the best crankshaft main bearings to keep your engine running strong?
I’ll show you top-quality options that make your engine smoother, more reliable, and easier to maintain.

Crankshaft main bearings are the heart of your engine. They keep everything running smooth and strong. Without them, your engine would fail fast.

Choosing the right bearings can save you time and money. They reduce wear and tear, keeping your engine reliable. A good set ensures long life and peak performance.

We’ve tested and reviewed the best options for you. Find the perfect fit for your engine. Start your journey to a smoother ride now.

List of Top 10 Crankshaft Main Bearings

Title	Best For	Price
Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series \| Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines \| Complete Bearing Set for Stock or Performance Builds	This product is perfect for LS engine builders who want a smooth, strong, and long‑lasting setup. It’s great for anyone doing a stock rebuild or a performance upgrade and needs bearings they can trust.	View on Amazon (paid link)
STD Main & Rod Bearing Set Replacement for Chevy LS 4.8 5.3 5.7 6.0 6.2L Engine 1997-2013 LS1 LS2 LS3 V8, Standard Size Crankshaft Connecting Rod Bearing kit MS2199P MB5293SI CB663P CR807SI	This STD Main & Rod Bearing Set is perfect for anyone rebuilding a Chevy LS engine from 1997 to 2013. It’s ideal for those needing a standard-size kit to support their crankshaft and prevent engine damage.	View on Amazon (paid link)
Clevite 77 MS-2199H Engine Crankshaft Main Bearing Set	The Clevite 77 MS-2199H Engine Crankshaft Main Bearing Set is perfect for car enthusiasts and mechanics who want reliable, high-quality parts. It’s ideal for those upgrading or repairing engines, offering better strength and accuracy for long-lasting performance.	View on Amazon (paid link)
Clevite MS-2339H Engine Crankshaft Main Bearing Set	The Clevite MS-2339H is perfect for small engine rebuilders. Its 20% stronger material means less wear and more power.	View on Amazon (paid link)
DNJ MB1160 Main Bearings Set Standard for 2003-2022 Chrysler, Dodge, Jeep, Ram 1500, 1500 Classic, 2500 5.7L-6.4L V8 16V OHV 345cid	This is great for anyone who wants smooth engine power and steady performance. It is ideal for drivers who want strong, reliable, and long‑lasting engine parts.	View on Amazon (paid link)
STD Main & Rod Bearings Kit Compatible with Chevy GM 1968-2002 SBC 350 305 327 307 5.7L 5.0L V8 Car & Truck Engines – 2.450in Journal Standard Size Replace# MS909A BC296J BB253J CB663A 8-2555A	This kit is perfect for engine builders and DIY car fans who want smooth, strong, and safe engine work. It’s great for anyone rebuilding a Chevy SBC and needs a precise, long‑lasting fit.	View on Amazon (paid link)
GM Genuine Parts 12591092 Engine Crankshaft Bearing Set	This part is perfect for drivers who want their engine to run smooth and strong. It’s great for anyone who trusts real GM parts made for their exact vehicle.	View on Amazon (paid link)
Clevite MS-1804A Engine Crankshaft Main Bearing Set	This set is perfect for engine builders and performance drivers who want strong, steady, long‑lasting main bearings that hold up under pressure.	View on Amazon (paid link)
EPChunMi STD MB1160 Main Bearings Set for Chrysler for Dodge for Jeep for Ram 5.7L-6.4L V8 2003-2016 Standard Crankshaft Main Bearings kit Replace MB5659SI 5M2220A	This product is perfect for drivers and DIY engine fans who want smooth power and long engine life. It is also great for anyone who needs strong, reliable, and easy‑fit main bearings for a V8 engine.	View on Amazon (paid link)
DNJ MB3125.10 Oversize Main Bearings Set for 1980-2014 Chevrolet, GMC, Isuzu, Oldsmobile, Pontiac Astro, Blazer, Bravada 3.8L-4.3L V6 12V OHV 229cid	This is great for anyone who wants smooth engine work and needs a strong, reliable fit for their V6. It helps drivers who want their engine to run clean and steady with no stress.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 crankshaft main bearings handpicked for performance and reliability. Each product is expert-reviewed and backed by customer feedback, ensuring you get the best value for your engine. Whether you’re upgrading or rebuilding, this guide makes it easy to find the perfect fit for your needs.

1. Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds

Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds

The Michigan Motorsports LS Main Crank Bearings give your engine strong and steady support. They fit right into Gen III and Gen IV LS motors with ease. The build is clean and made for smooth use.

They fit many LS engines. They hold up well. They run quiet.

These SI‑Series bearings use tough silicon aluminum for long life. They help cut wear and keep the crank moving smooth. Your LS build stays strong, steady, and ready for more.

Pros	Cons
Strong build for long engine life Smooth fit for many LS motors Better oil control under load Cuts wear for a quiet run Great pick for stock or boosted builds	Not for upgraded crankshafts, only fits stock sizes. Standard size may limit performance in high-RPM builds. No extras, just bearings, no tools or accessories included.

Perfect For:

This product is perfect for LS engine builders who want a smooth, strong, and long‑lasting setup. It’s great for anyone doing a stock rebuild or a performance upgrade and needs bearings they can trust.

Ready to Purchase?

View Price on Amazon (paid link)

2. STD Main & Rod Bearing Set Replacement for Chevy LS 4.8 5.3 5.7 6.0 6.2L Engine 1997-2013 LS1 LS2 LS3 V8, Standard Size Crankshaft Connecting Rod Bearing kit MS2199P MB5293SI CB663P CR807SI

STD Main & Rod Bearing Set Replacement for Chevy LS 4.8 5.3 5.7 6.0 6.2L Engine 1997-2013 LS1 LS2 LS3 V8, Standard Size Crankshaft Connecting Rod Bearing kit MS2199P MB5293SI CB663P CR807SI

Revitalize your Chevy LS engine with the STD Main & Rod Bearing Set. This standard-size kit fits 1997-2013 LS V8 engines, ensuring a precise fit for reliable performance.

Crafted from high-strength metal, these bearings minimize wear and prevent engine damage. Regular replacement keeps your engine running smoothly and extends its lifespan.

ARMKER’s bearings are trusted by manufacturers and repair shops. With expert customer support, rebuilding your engine has never been easier.

Pros	Cons
Fits many LS V8 engines with ease Stops wear for smooth, safe engine use Strong metal gives long, steady life Precise fit keeps parts running right Fast help from a trusted support team	Standard size may not fit all custom builds. No installation tools included, requires extra purchase. Not for high-performance engines, only standard use.

Perfect For:

This STD Main & Rod Bearing Set is perfect for anyone rebuilding a Chevy LS engine from 1997 to 2013. It’s ideal for those needing a standard-size kit to support their crankshaft and prevent engine damage.

Ready to Purchase?

View Price on Amazon (paid link)

3. Clevite 77 MS-2199H Engine Crankshaft Main Bearing Set

This bearing set is strong and light. It uses cast copper-lead for high strength. It gives your engine smooth, steady support.

It has more room for the crank. It fits with high accuracy.

It holds tight with high crush. It has steel backing for a firm fit. It is made in Atlantic, Iowa USA.

Pros	Cons
Strong build for long engine life High strength design boosts power support Smooth fit for steady crank motion Better hold with firm seating Made in USA for trusted quality	May need pro install for best fit Not ideal for low‑stress builds Higher cost than basic bearing sets

Perfect For:

The Clevite 77 MS-2199H Engine Crankshaft Main Bearing Set is perfect for car enthusiasts and mechanics who want reliable, high-quality parts. It’s ideal for those upgrading or repairing engines, offering better strength and accuracy for long-lasting performance.

Ready to Purchase?

View Price on Amazon (paid link)

4. Clevite MS-2339H Engine Crankshaft Main Bearing Set

The Clevite MS-2339H Main Bearing Set is built for strong, steady engine support. It uses cast copper‑lead to boost strength by 20%.
Each bearing is narrowed to give more room for the crankshaft fillet. This helps the crank spin smooth and free.

These bearings are made in Atlantic, Iowa USA with high crush for firm hold. The steel backing stays true in shape for clean, tight fit.

They run cool. They hold strong. They last long.

Pros	Cons
Strong build for long engine life High fatigue strength for tough use Smooth fit with better crank room Tight hold for steady performance Accurate shape for clean contact	May need pro install for best fit Not ideal for low‑stress stock builds Costs more than basic bearing sets

Perfect For:

The Clevite MS-2339H is perfect for small engine rebuilders. Its 20% stronger material means less wear and more power.

Ready to Purchase?

View Price on Amazon (paid link)

5. DNJ MB1160 Main Bearings Set Standard for 2003-2022 Chrysler, Dodge, Jeep, Ram 1500, 1500 Classic, 2500 5.7L-6.4L V8 16V OHV 345cid

This Brand New DNJ MB1160 Main Bearings Set Standard is designed for 2003-2022 Chrysler, Dodge, Jeep, and Ram engines. It fits 5.7L-6.4L V8 OHV engines and ensures reliable performance.

This set services the entire engine.
DNJ has a 30+ year track record of quality.
Perfect for 5.7L-6.4L V8 OHV engines.

Pros	Cons
Strong build for long engine life Easy fit for many V8 models Fresh parts for smooth engine work Trusted brand with 30+ years of quality One set covers the full engine	May not fit engines outside listed years Only one size, no extra options Needs pro install for best results

Perfect For:

This is great for anyone who wants smooth engine power and steady performance. It is ideal for drivers who want strong, reliable, and long‑lasting engine parts.

Ready to Purchase?

View Price on Amazon (paid link)

6. STD Main & Rod Bearings Kit Compatible with Chevy GM 1968-2002 SBC 350 305 327 307 5.7L 5.0L V8 Car & Truck Engines – 2.450in Journal Standard Size Replace# MS909A BC296J BB253J CB663A 8-2555A

STD Main & Rod Bearings Kit Compatible with Chevy GM 1968-2002 SBC 350 305 327 307 5.7L 5.0L V8 Car & Truck Engines - 2.450in Journal Standard Size Replace# MS909A BC296J BB253J CB663A 8-2555A

Keep your engine running smoothly with this STD Main & Rod Bearings Kit. It’s compatible with Chevy GM engines from 1968 to 2002. Perfect for SBC 350, 305, 327, and 307 V8 engines.

These bearings support the crankshaft and prevent metal-to-metal contact. Regular replacement reduces engine damage risk. They fit 2.450in crankshaft journals precisely.

Manufactured to OE specifications, these bearings ensure lasting durability. ARMKER offers one-year support for peace of mind. Rebuild your engine with confidence today.

Pros	Cons
Fits many Chevy SBC engines with ease Protects the crank for smooth, safe running Lasts long with strong build quality Stops wear with precise standard sizing Backed by solid one-year support	May not fit rare or custom engine builds Standard size only, no oversize options Needs pro install for best long-term results

Perfect For:

This kit is perfect for engine builders and DIY car fans who want smooth, strong, and safe engine work. It’s great for anyone rebuilding a Chevy SBC and needs a precise, long‑lasting fit.

Ready to Purchase?

View Price on Amazon (paid link)

7. GM Genuine Parts 12591092 Engine Crankshaft Bearing Set

This engine bearing set is built for a smooth, steady drive. It uses true GM design for a perfect fit. It helps your engine run clean and strong.

Each piece is made to strict GM standards. Every part is tested for real performance.

It works with many GM cars and trucks. It uses updated materials for long life. It gives your engine safe, solid support.

Pros	Cons
Made to match strict GM standards Built for long, smooth engine life Tested for strong and steady performance Updated with new tech for better fit Trusted by GM for true OE quality	Higher cost than some basic aftermarket sets Limited use to select GM engines May require pro install for best fit

Perfect For:

This part is perfect for drivers who want their engine to run smooth and strong. It’s great for anyone who trusts real GM parts made for their exact vehicle.

Ready to Purchase?

View Price on Amazon (paid link)

8. Clevite MS-1804A Engine Crankshaft Main Bearing Set

This bearing set is built for strong, steady engine performance. It uses a tough copper‑lead design that adds real strength.

The hard aluminum alloy holds up well. It stays smooth under load. It works closely with the crank for power.

It is great for nodular iron cranks. It has 100% bored inner surfaces for clean fit. It meets strict OE standards for trust.

Pros	Cons
Cast copper-lead boosts strength by 20%. Hard aluminum alloy wears well and lasts longer. Perfectly made for nodular iron crankshafts. 100% bored inside diameters ensure a perfect fit. Meets or exceeds OE specifications for reliability.	Not for steel crankshafts, only nodular iron. Harder alloy may wear journals faster in some engines. No powdered metal option for cost-sensitive buyers.

Perfect For:

This set is perfect for engine builders and performance drivers who want strong, steady, long‑lasting main bearings that hold up under pressure.

Ready to Purchase?

View Price on Amazon (paid link)

9. EPChunMi STD MB1160 Main Bearings Set for Chrysler for Dodge for Jeep for Ram 5.7L-6.4L V8 2003-2016 Standard Crankshaft Main Bearings kit Replace MB5659SI 5M2220A

EPChunMi STD MB1160 Main Bearings Set for Chrysler for Dodge for Jeep for Ram 5.7L-6.4L V8 2003-2016 Standard Crankshaft Main Bearings kit Replace MB5659SI 5M2220A

Main bearings fit your engine. They help parts move well.

This set is strong. It fits a V8 engine. Use it to fix your car.

Pros	Cons
Easy to install with direct fit design Strong wear resistance for long engine life Helps boost oil pressure and control Cuts friction for smoother engine work Reliable OEM‑level build quality	Not for all engines, check fit before buying. Standard size only, no undersize options available. No installation tools included, extra purchase needed.

Perfect For:

This product is perfect for drivers and DIY engine fans who want smooth power and long engine life. It is also great for anyone who needs strong, reliable, and easy‑fit main bearings for a V8 engine.

Ready to Purchase?

View Price on Amazon (paid link)

10. DNJ MB3125.10 Oversize Main Bearings Set for 1980-2014 Chevrolet, GMC, Isuzu, Oldsmobile, Pontiac Astro, Blazer, Bravada 3.8L-4.3L V6 12V OHV 229cid

The DNJ MB3125.10 main bearing set gives your engine strong, smooth support. It is brand new and built for long use. It helps your motor run clean and steady.

It fits many Chevrolet, GMC, and Isuzu V6 engines. One set serves the whole engine.

DNJ has over 30 years of proven skill. Their parts are known for quality and trust. This set is made to keep your engine safe and strong.

Pros	Cons
Strong build for long engine life Smooth fit for many V6 models Full set for a complete job Trusted brand with 30+ years of quality Fresh parts for clean, steady performance	May not fit all engine builds Needs skill to install right Not ideal for rare engine types

Perfect For:

This is great for anyone who wants smooth engine work and needs a strong, reliable fit for their V6. It helps drivers who want their engine to run clean and steady with no stress.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Crankshaft main bearings are key to your engine’s health. They keep it smooth and strong. Picking the right ones saves time and money.

Choosing the best crankshaft main bearings is easy when you know what to look for. Here’s a simple guide to help you make a smart choice.

Engine Compatibility:
Make sure the bearings fit your engine. Check the make, model, and year for a perfect match.
Material Quality:
Look for strong materials like silicon aluminum or copper-lead. They last longer and reduce wear.
Size and Fit:
Choose standard or oversize based on your needs. A precise fit keeps your engine running smoothly.
Brand Reputation:
Go for trusted brands with a proven track record. They offer quality and reliability.
Durability:
Pick bearings that handle heat and pressure well. They should last long under tough conditions.
Ease of Installation:
Look for bearings that are easy to install. This saves time and effort.
Customer Support:
Choose brands with good support. It helps with questions or issues later on.

With these tips, you’ll find the perfect bearings for your engine. Enjoy a smoother ride and longer engine life!