Main Bearings
Circle Track Main Bearings at JJ Motorsports
Main bearings support the crankshaft's weight and rotation, providing durability and stability under high loads in circle track racing. Designed for late models, modifieds, and street stocks, these bearings ensure consistent performance and longevity in demanding IMCA, USMTS, and dirt oval conditions, available in coated and extra clearance options for Small Block Ford and GM LS-Series engines.
Shop trusted brands like MAHLE ORIGINAL/CLEVITE for coated H-Series sets, KING BEARINGS for high-performance options, and ACL BEARINGS for reliable bearings. Explore related categories such as Circle Track Engine Bearings for complete bearing solutions or Circle Track Engines and Components for additional upgrades.
Top Circle Track Main Bearings
- Coated Main Bearing Set MS-590HC – Main Bearing H-Series Standard Coated Small Block Ford.
- Main Bearing Set GM LS MS-2411HX – Main Bearings H-Series Standard Extra Oil Clearance GM LS-Series.
- Main Bearing Set GM LS Coated MS-2411HC – Main Bearings H-Series Standard Coated GM LS-Series.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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Main Bearing Set 140M
SEALED POWER
$90.99High-quality Main Bearing for enhanced engine performance Manufactured by Speed Pro, a trusted name in automotive parts Standard size designed for optimal fit and function Compatible with Small Block Chevy engines, ensuring versatility Comprehensive kit...SEA140M- SKU:
- SEA140M
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- MFG Part #:
- 140M
$90.99 -
Main Bearing Set SEA139M11
SEALED POWER
$93.99Main Bearing - Speed Pro - 0.011 in Undersize - Small Block Chevy - KitSEA139M11- SKU:
- SEA139M11
- Availability:
- Ships Same Business Day
- Weight:
- 1.32 LBS
- MFG Part #:
- 139M11
$93.99 -
Main Bearing Set SEA139M10
SEALED POWER
$85.99Main Bearing - Speed Pro - 0.010 in Undersize - Small Block Chevy - KitSEA139M10- SKU:
- SEA139M10
- Availability:
- Ships Same Business Day
- Weight:
- 1.29 LBS
- MFG Part #:
- 139M10
$85.99 -
Main Bearing Set SEA139M1
SEALED POWER
$77.99Precision-engineered main bearing set for optimal performance. 0.001 inch undersize, perfect for small block Chevy applications. Durable construction ensures longevity and reliability under high stress. Designed for easy installation,...SEA139M1- SKU:
- SEA139M1
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- MFG Part #:
- 139M1
$77.99 -
Main Bearing Set 139M
SEALED POWER
$92.99High-quality Main Bearing for enhanced engine performance Manufactured by Speed Pro, a trusted name in automotive parts Standard size designed for optimal fit and function Compatible with Small Block Chevy engines, ensuring versatility Comprehensive kit...SEA139M- SKU:
- SEA139M
- Availability:
- Ships Same Business Day
- Weight:
- 1.29 LBS
- MFG Part #:
- 139M
$92.99 -
Main Bearing Set SEA130M1X
SEALED POWER
$92.99Main Bearing - Speed Pro - 0.001 in Undersize - Small Block Ford - KitSEA130M1X- SKU:
- SEA130M1X
- Availability:
- Ships Same Business Day
- Weight:
- 1.47 LBS
- MFG Part #:
- 130M1X
$92.99 -
Main Bearing Set SEA130M10
SEALED POWER
$87.99Main Bearing - Speed Pro - 0.010 in Undersize - Small Block Ford - KitSEA130M10- SKU:
- SEA130M10
- Availability:
- Ships Same Business Day
- Weight:
- 1.52 LBS
- MFG Part #:
- 130M10
$87.99 -
Main Bearing Set 130M
SEALED POWER
$94.99Main BearingSpeed ProStandardSmall Block FordKitSEA130M- SKU:
- SEA130M
- Availability:
- Ships Same Business Day
- Weight:
- 1.48 LBS
- MFG Part #:
- 130M
$94.99 -
Main Bearing Set 129M
SEALED POWER
$105.99Main BearingSpeed ProStandardSmall Block FordKitSEA129M- SKU:
- SEA129M
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- MFG Part #:
- 129M
$105.99 -
Main Bearing Set MS-981P-20
MICHIGAN 77
$83.99Main Bearing Set MS-981P-20 High-quality main bearing designed for durability and performance. Compatible with Ford Cleveland, Modified, and Small Block engines. P-Series construction for enhanced reliability and strength. 0.020 in undersize for precise...M77MS981P20- SKU:
- M77MS981P20
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- MFG Part #:
- MS981P20
$83.99 -
Main Bearing Set MS-981P-10
MICHIGAN 77
$88.99Main Bearing Set MS-981P-10 High-quality main bearing set for optimal engine performance Designed specifically for Ford Cleveland, Modified, and Small Block engines Features a P-Series design for enhanced durability 0.010 inch undersize for precision...M77MS981P10- SKU:
- M77MS981P10
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- MFG Part #:
- MS981P10
$88.99 -
Main Bearing Set MS-981P
MICHIGAN 77
$84.99Main Bearing Set MS-981P High-quality main bearing set for durability Designed specifically for P-Series applications Standard size for easy installation Compatible with Ford Cleveland, Modified, and Small Block engines Comprehensive kit for all...M77MS981P- SKU:
- M77MS981P
- Availability:
- Ships Same Business Day
- Weight:
- 1.34 LBS
- MFG Part #:
- MS981P
$84.99 -
Main Bearing Set MS-981H
MICHIGAN 77
$103.99Main Bearing Set - MS-981H High-quality main bearing set designed for optimal engine performance. Compatible with H-Series engines for seamless integration. Standard sizing ensures a perfect fit for your application. Specifically engineered for Ford...M77MS981H- SKU:
- M77MS981H
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- MFG Part #:
- MS981H
$103.99 -
Main Bearing Set MS-909P-30
MICHIGAN 77
$51.99Main Bearing Set Main BearingP-Series0.030 in UndersizeSmall Block ChevyKitM77MS909P30- SKU:
- M77MS909P30
- Availability:
- Ships Same Business Day
- Weight:
- 1.36 LBS
- MFG Part #:
- MS909P30
$51.99 -
Main Bearing Set MS-909P-20
MICHIGAN 77
$52.99Main Bearing Set - MS-909P-20 Designed for optimal performance in Small Block Chevy engines Includes a complete set of main bearings for easy installation P-Series construction ensures durability and reliability 0.020 in undersize for precise fit and...M77MS909P20- SKU:
- M77MS909P20
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- MFG Part #:
- MS909P20
$52.99 -
Main Bearing Set MS-909P-10
MICHIGAN 77
$51.99Main Bearing Set MS-909P-10 Includes high-quality main bearings Designed specifically for P-Series applications Features a 0.010 inch undersize for precise fit Compatible with Small Block Chevy engines Comes as a complete kit for easy...M77MS909P10- SKU:
- M77MS909P10
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
- MFG Part #:
- MS909P10
$51.99 -
Main Bearing Set MS-909P-1
MICHIGAN 77
$54.99Main Bearing Set Main BearingP-Series0.001 in UndersizeSmall Block ChevyKitM77MS909P1- SKU:
- M77MS909P1
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
- MFG Part #:
- MS909P1
$54.99 -
Main Bearing Set MS-909P
MICHIGAN 77
$51.99Main Bearing Set MS-909P High-quality main bearing set for reliable engine performance Designed specifically for P-Series applications Standard size to fit various small block Chevy models Includes all necessary components for a complete...M77MS909P- SKU:
- M77MS909P
- Availability:
- Ships Same Business Day
- Weight:
- 1.22 LBS
- MFG Part #:
- MS909P
$51.99 -
Main Bearing Set MS-909HX
MICHIGAN 77
$106.99Main Bearing Set MS-909HX High-quality main bearing set designed for durability Compatible with H-Series engines for optimal performance Standard size ensures a perfect fit for your engine Features extra oil clearance for improved...M77MS909HX- SKU:
- M77MS909HX
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- MFG Part #:
- MS909HX
$106.99 -
Main Bearing Set MS-909H-9
MICHIGAN 77
$98.99Main Bearing Set Main BearingH-Series0.009 in UndersizeSmall Block ChevyKitM77MS909H9- SKU:
- M77MS909H9
- Availability:
- Ships Same Business Day
- Weight:
- 1.29 LBS
- MFG Part #:
- MS909H9
$98.99
