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 SBC MB 557SISTDX
KING BEARINGS
$23.99A quality main bearing set is the foundation of any reliable Small Block Chevy engine—it directly impacts oil flow, load distribution, and long-term durability under sustained power. The SI-Series Main Bearing Set SBC MB 557SISTDX delivers OEM-spec...KEBMB557SISTDX- SKU:
- KEBMB557SISTDX
- Availability:
- Ships Same Business Day
- Weight:
- 1.18 LBS
$23.99 -
Main Bearing Set GM LS1/LS2/LS4/LS6 MB5013XP 010X
KING BEARINGS
$137.99When you're pushing LS power to the limit, factory bearings simply can't handle the increased loads and heat cycling that come with modified engines. The MB5013XP 010X main bearing set delivers the precision clearances and robust construction needed to...KEBMB5013XP010X- SKU:
- KEBMB5013XP010X
- Availability:
- Ships Same Business Day
- Weight:
- 1.34 LBS
$137.99Qty in Cart: 0Quantity:Price:$137.99Subtotal: -
Main Bearing Set MS-1432P-30
MICHIGAN 77
$77.99A quality main bearing set is the foundation of any reliable engine build—without proper bearing clearance and support, even the strongest bottom end will fail prematurely under load. The MS-1432P-30 delivers OEM-level precision with 0.030" undersize...M77MS1432P30- SKU:
- M77MS1432P30
- Availability:
- Ships Same Business Day
- Weight:
- 1.53 LBS
$77.99 -
XP Main Bearing Set Dart LS-next Block MB5777XP
KING BEARINGS
$169.99Main bearing wear is one of the quickest paths to catastrophic engine failure—and inferior bearings amplify that risk exponentially. The XP Main Bearing Set for Dart LS-next blocks delivers the precision clearances and material durability required for...KEBMB5777XP- SKU:
- KEBMB5777XP
- Availability:
- Ships Same Business Day
- Weight:
- 1.28 LBS
$169.99 -
Main Bearing Set SEA140M20
SEALED POWER
$77.99Main bearing wear directly impacts engine longevity, oil pressure stability, and overall reliability—especially in performance applications where tight tolerances are non-negotiable. This precision-engineered main bearing set delivers the exact fit and...SEA140M20- SKU:
- SEA140M20
- Availability:
- Ships Same Business Day
- Weight:
- 1.48 LBS
- MFG Part #:
- 140M20
$77.99Qty in Cart: 0Quantity:Price:$77.99Subtotal: -
Main Bearing Set SEA139M20
SEALED POWER
$88.99A quality main bearing set is foundational to engine longevity and reliability, especially in high-revving or rebuilt engines where precision fit directly impacts oil pressure and overall durability. The Speed Pro 139M20 delivers the exact undersize spec...SEA139M20- SKU:
- SEA139M20
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- MFG Part #:
- 139M20
$88.99 -
Main Bearing Set MS-429HX
MICHIGAN 77
$123.99Engine longevity depends on bearing quality and oil film integrity—undersized or worn bearings compromise both. The MS-429HX delivers the precision clearances and material consistency your Small Block Chevy needs for reliable power delivery under...M77MS429HX- SKU:
- M77MS429HX
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- MFG Part #:
- MS429HX
$123.99 -
Main Bearing Set MS-429H-10
MICHIGAN 77
$132.99Main bearing clearance is critical to engine longevity—too tight and you risk oil starvation; too loose and you invite catastrophic wear. The MS-429H-10 eliminates guesswork with precision-ground, 0.010-inch undersized bearings engineered specifically...M77MS429H10- SKU:
- M77MS429H10
- Availability:
- Ships Same Business Day
- Weight:
- 1.27 LBS
- MFG Part #:
- MS429H10
$132.99 -
Main Bearing Set MS-1038H-11
MICHIGAN 77
$89.99A quality main bearing set is fundamental to engine durability and reliability, especially when running a small block Chevy at high RPM or under boost. The MS-1038H-11 is engineered to maintain precise clearances and oil film strength, preventing...M77MS1038H11- SKU:
- M77MS1038H11
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- MFG Part #:
- MS1038H11
$89.99Qty in Cart: 0Quantity:Price:$89.99Subtotal: -
Main Bearing Set MS-1038H
MICHIGAN 77
$91.99Main bearing wear is one of the most common causes of catastrophic engine failure, especially under sustained high RPM operation. The MS-1038H delivers OEM-quality construction with tight tolerances to maintain proper oil clearance and load distribution...M77MS1038H- SKU:
- M77MS1038H
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- MFG Part #:
- MS1038H
$91.99 -
Main Bearing Set. KEBMB557SI001
KING BEARINGS
$33.99A quality main bearing set is critical for engine longevity and reliability, especially in high-performance or rebuilt Small Block Chevy applications. The Alecular SI main bearing set delivers consistent oil film strength and dimensional precision where...KEBMB557SI001- SKU:
- KEBMB557SI001
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MFG Part #:
- MB 557SI 001
$33.99 -
Main Bearing Set MB 509XP
KING BEARINGS
$75.99A quality main bearing set is the foundation of engine reliability—it directly impacts oil pressure stability, bearing longevity, and overall engine durability under load. The MB 509XP delivers consistent performance and precision fitment for Small Block...KEBMB509XP- SKU:
- KEBMB509XP
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- MFG Part #:
- MB 509XP
$75.99 -
On Sale
Main Bearing Set - Calico Coated MS429HX
CALICO COATINGS
MSRP: $193.99Now: $175.77Was: $193.99Main bearings are the foundation of engine reliability—they handle extreme pressures and temperatures that demand precision engineering. The Calico Coated MS429HX delivers superior load capacity and extended service life through advanced bearing surface...CLCMS429HX- SKU:
- CLCMS429HX
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- MFG Part #:
- MS429HX
MSRP: $193.99Now: $175.77Was: $193.99 -
On Sale
Main Bearing Set - Calico Coated MS429H
CALICO COATINGS
MSRP: $223.99Now: $202.09Was: $223.99Engine longevity depends on bearing quality, and worn or inadequate main bearings accelerate catastrophic failure under high RPM and load. The MS429H Calico Coated set delivers reliable oil film retention and reduced wear rates, protecting your bottom...CLCMS429H- SKU:
- CLCMS429H
- Availability:
- Ships Same Business Day
- Weight:
- 1.23 LBS
- MFG Part #:
- MS429H
MSRP: $223.99Now: $202.09Was: $223.99
