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
-
Main Bearing Set MS-909H-21
MICHIGAN 77
$97.99A worn or damaged main bearing set directly compromises engine block integrity and can lead to catastrophic failure under racing conditions. The MS-909H-21 delivers the precision tolerances and material quality your Small Block Chevy engine demands,...M77MS909H21- SKU:
- M77MS909H21
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- MFG Part #:
- MS909H21
$97.99 -
Main Bearing Set MS-909H-20
MICHIGAN 77
$98.99If you're rebuilding a Small Block Chevy engine or restoring one that's suffered bearing wear, a quality main bearing set is non-negotiable for reliability and longevity. The MS-909H-20 delivers the precision tolerances your engine demands, ensuring...M77MS909H20- SKU:
- M77MS909H20
- Availability:
- Ships Same Business Day
- Weight:
- 1.37 LBS
- MFG Part #:
- MS909H20
$98.99 -
Main Bearing Set MS-909H-19
MICHIGAN 77
$109.99A quality main bearing set is fundamental to engine longevity and reliability—especially in high-performance applications where precise clearances directly impact oil flow, load distribution, and overall engine durability. The MS-909H-19 delivers the...M77MS909H19- SKU:
- M77MS909H19
- Availability:
- Ships Same Business Day
- Weight:
- 1.34 LBS
- MFG Part #:
- MS909H19
$109.99Qty in Cart: 0Quantity:Price:$109.99Subtotal: -
Main Bearing Set MS-909H-10
MICHIGAN 77
$101.99A properly sized main bearing set is critical for engine longevity and reliable performance under load. The MS-909H-10 delivers precision-engineered tolerances that minimize friction, reduce wear, and maintain critical oil clearances in your Small Block...M77MS909H10- SKU:
- M77MS909H10
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- MFG Part #:
- MS909H10
$101.99 -
Main Bearing Set MS-909H-1
MICHIGAN 77
$106.99A worn or improperly sized main bearing set will compromise your Small Block Chevy's reliability and power delivery—especially under boost or sustained high RPM operation. The MS-909H-1 delivers the precision fit and material durability required for...M77MS909H1- SKU:
- M77MS909H1
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
- MFG Part #:
- MS909H1
$106.99 -
Main Bearing Set MS-909H
MICHIGAN 77
$88.99Main bearing wear is one of the most common failure points in high-mileage engines, directly affecting oil pressure, engine longevity, and overall performance. The MS-909H delivers factory-spec tolerances with premium materials, ensuring your Small Block...M77MS909H- SKU:
- M77MS909H
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- MFG Part #:
- MS909H
$88.99 -
Main Bearing Set MS-590P-30
MICHIGAN 77
$34.99A properly sized main bearing set is the foundation of engine reliability and longevity. If you're rebuilding a Small Block Ford or have worn OEM bearings showing increased clearances, the MS-590P-30 delivers the precision fit needed to restore proper...M77MS590P30- SKU:
- M77MS590P30
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- MFG Part #:
- MS590P30
$34.99 -
Main Bearing Set MS-590P-20
MICHIGAN 77
$61.99A properly sized main bearing set is critical to engine longevity and reliability—it directly impacts oil flow, reduces friction, and prevents catastrophic bearing failure under load. The MS-590P-20 is engineered for Small Block Ford engines requiring 0...M77MS590P20- SKU:
- M77MS590P20
- Availability:
- Ships Same Business Day
- Weight:
- 1.19 LBS
- MFG Part #:
- MS590P20
$61.99 -
Main Bearing Set MS-590P-10
MICHIGAN 77
$61.99A properly fitted main bearing set is critical to engine block integrity and long-term reliability, especially in high-performance or rebuilt small block Ford engines. The MS-590P-10 delivers precision-engineered components that maintain proper...M77MS590P10- SKU:
- M77MS590P10
- Availability:
- Ships Same Business Day
- Weight:
- 1.12 LBS
- MFG Part #:
- MS590P10
$61.99 -
Main Bearing Set MS-590P
MICHIGAN 77
$61.99A quality main bearing set is foundational to engine reliability and longevity, especially in high-performance and racing applications where loads are extreme. The MS-590P delivers OEM-grade precision with tight tolerances to ensure proper oil film...M77MS590P- SKU:
- M77MS590P
- Availability:
- Ships Same Business Day
- Weight:
- 1.09 LBS
- MFG Part #:
- MS590P
$61.99 -
Main Bearing Set MS-590HX
MICHIGAN 77
$114.99A quality main bearing set is critical to engine longevity and reliability—especially in high-performance or high-mileage Small Block Ford engines. The MS-590HX delivers extra oil clearance to accommodate tighter tolerances and elevated RPMs, ensuring...M77MS590HX- SKU:
- M77MS590HX
- Availability:
- Ships Same Business Day
- Weight:
- 1.08 LBS
- MFG Part #:
- MS590HX
$114.99Qty in Cart: 0Quantity:Price:$114.99Subtotal: -
Main Bearing Set MS-590H-10
MICHIGAN 77
$119.99Main bearing clearance is critical to engine longevity—inadequate fit leads to accelerated wear, oil starvation, and catastrophic failure. The MS-590H-10 delivers precision-engineered geometry with a 0.010" undersize specifically matched to Small Block...M77MS590H10- SKU:
- M77MS590H10
- Availability:
- Ships Same Business Day
- Weight:
- 1.18 LBS
- MFG Part #:
- MS590H10
$119.99 -
Main Bearing Set MS-590H-1
MICHIGAN 77
$112.99A quality main bearing set is foundational to engine reliability and longevity, especially in high-performance or rebuilt applications. The MS-590H-1 delivers precise tolerances and robust construction to handle sustained load and RPM demands. If you're...M77MS590H1- SKU:
- M77MS590H1
- Availability:
- Ships Same Business Day
- Weight:
- 1.13 LBS
- MFG Part #:
- MS590H1
$112.99 -
Main Bearing Set MS-590H
MICHIGAN 77
$97.99Main bearing wear is one of the most common failure points in high-mileage Small Block Ford engines, directly impacting oil pressure, engine longevity, and overall reliability. The MS-590H delivers OEM-spec fitment and material quality without the...M77MS590H- SKU:
- M77MS590H
- Availability:
- Ships Same Business Day
- Weight:
- 1.12 LBS
- MFG Part #:
- MS590H
$97.99 -
Main Bearing Set MS-429P-30
MICHIGAN 77
$81.99A proper main bearing set is critical to engine longevity and reliable power delivery—worn or incorrectly sized bearings lead to catastrophic failure. The MS-429P-30 delivers precise fitment for P-Series Small Block Chevy applications with its 0.030"...M77MS429P30- SKU:
- M77MS429P30
- Availability:
- Ships Same Business Day
- Weight:
- 1.28 LBS
- MFG Part #:
- MS429P30
$81.99 -
Main Bearing Set MS-429P-20
MICHIGAN 77
$102.99Proper main bearing clearance is critical to engine longevity and reliability—undersized bearings compensate for wear and allow you to recondition your Small Block Chevy without expensive block machining. The MS-429P-20 delivers precise fitment and...M77MS429P20- SKU:
- M77MS429P20
- Availability:
- Ships Same Business Day
- Weight:
- 1.23 LBS
- MFG Part #:
- MS429P20
$102.99 -
Main Bearing Set MS-429P-10
MICHIGAN 77
$104.99A worn or damaged main bearing set will compromise your engine's reliability and performance—this is non-negotiable in high-performance applications. The MS-429P-10 is engineered to exacting tolerances, ensuring proper load distribution and oil film...M77MS429P10- SKU:
- M77MS429P10
- Availability:
- Ships Same Business Day
- Weight:
- 1.18 LBS
- MFG Part #:
- MS429P10
$104.99 -
Main Bearing Set MS-429P
MICHIGAN 77
$77.99Main bearing wear is one of the fastest ways to compromise engine longevity and performance—especially under high RPM or boost conditions. The MS-429P delivers OEM-quality construction with tight tolerances that maintain proper oil film strength and...M77MS429P- SKU:
- M77MS429P
- Availability:
- Ships Same Business Day
- Weight:
- 1.13 LBS
- MFG Part #:
- MS429P
$77.99 -
Main Bearing Set MS-429H
MICHIGAN 77
$127.99Main bearing wear is one of the most common failure points in high-mileage or high-boost engines—allowing clearance creep to develop and compromising oil pressure and engine longevity. The MS-429H Main Bearing Set delivers precision tolerances and...M77MS429H- SKU:
- M77MS429H
- Availability:
- Ships Same Business Day
- Weight:
- 1.19 LBS
- MFG Part #:
- MS429H
$127.99Qty in Cart: 0Quantity:Price:$127.99Subtotal: -
Main Bearing Set MS-1564P
MICHIGAN 77
$313.99Main bearing wear is one of the most common failure points in high-mileage Small Block Chevy engines, and running degraded bearings accelerates damage to your crankshaft and block. The MS-1564P delivers precision-engineered replacements that restore...M77MS1564P- SKU:
- M77MS1564P
- Availability:
- Ships Same Business Day
- Weight:
- 2.37 LBS
- MFG Part #:
- MS1564P
$313.99
