Product Description
King .010" Undersize Coated SI-Series Main Bearings for LS/LT Engines
Fits 1997-2024 Gen 3, Gen 4 & Gen 5 LS/LT Engines with Stock Crankshafts Ground .010" Undersize | King MB5293MC 010
King MB5293MC 010 coated SI-Series main bearings are designed for 1997-2024 Gen 3, Gen 4, and Gen 5 LS/LT-based engines using a stock crankshaft that has been ground .010" undersize on the main journals. These .010" undersize main bearings feature King’s SI-Series construction for stock replacement and mild performance applications, along with a factory-applied polymer coating for improved startup protection, anti-friction performance, and wear resistance. Ideal for engine rebuilds, crankshaft machining service, and OEM-style LS/LT bottom-end repairs, this bearing set is intended for stock crankshafts only and is not recommended for aftermarket crankshafts.
Key Features & Benefits
- .010" Undersize Main Bearing Set: King MB5293MC 010 is made for LS/LT stock crankshafts that have been ground .010" undersize on the main journals. This is the correct bearing option when machine work has reduced the crankshaft main journal diameter by .010".
- Coated SI-Series Construction: The “MC” version features a factory-applied polymer coating with solid lubricants and ceramic additives. This coating improves anti-friction and wear resistance while adding startup protection for standard engines and newer auto start/stop applications.
- Designed for Stock Crankshafts: King SI-Series main bearings are intended for stock replacement and mild performance builds using factory LS/LT crankshafts. For aftermarket crankshafts, King HP or XP Series bearings should be used instead.
- Improved Bearing Surface Finish: These bearings are designed with an improved finish to help reduce microscopic peaks on nodular cast iron crankshafts. The SI-Series design supports reduced wear, improved oil clearance control, and longer engine life in compatible rebuilds.
- Broad LS/LT Engine Coverage: Fits many Gen 3, Gen 4, and Gen 5 LS/LT engines from 1997-2024, including common 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, and 6.6L applications when using a compatible stock crankshaft ground .010" undersize.
Specs
- Brand: King Engine Bearings
- Part Number: MB5293MC 010
- Bearing Series: SI-Series
- Size: .010" undersize main bearings
- Coating: Factory-applied polymer coating with solid lubricants and ceramic additives
- Crankshaft Compatibility: Stock LS/LT crankshafts ground .010" undersize on the mains
Important Fitment Notes
- Crankshaft Size: This part number is for crankshafts that have been ground .010" undersize on the main journals.
- Stock Crankshaft Only: These bearings are intended for factory LS/LT crankshafts. Use King HP or XP Series bearings for aftermarket crankshaft applications.
- Locating Tab Note: King no longer makes these bearings with a locating tab on the thrust bearing or the upper bearings installed into the block. Install the upper bearing shells centered in the block saddles; they are held in place by crush force when the main caps are installed.
Notes
- Product Type: Coated main bearing set for LS/LT engines.
- Engine Compatibility: Fits compatible 1997-2024 Gen 3, Gen 4, and Gen 5 LS/LT-based engines with stock crankshafts ground .010" undersize.
- Application Level: Stock replacement and mild performance applications using a factory crankshaft.
- Auto Start/Stop Protection: Polymer coating provides proper startup protection for newer engines equipped with auto start/stop and adds extra protection for standard engines.
- Recommended Use: LS/LT engine rebuilds, crankshaft machining repairs, main bearing replacement, bottom-end service, stock crankshaft repairs, and mild performance engine builds.
Key Fitments
- 1997-2024 Gen 3, Gen 4, and Gen 5 LS/LT engines with stock crankshafts ground .010" undersize
- LS1 / LS2 / LS3 / LS6 engine applications with compatible stock crankshaft main journals
- L99 / LSA engine applications with compatible stock crankshaft main journals
- L92 / L9H / L94 engine applications with compatible stock crankshaft main journals
- L76 / L77 / LY6 / L96 engine applications with compatible stock crankshaft main journals
- LFA / LZ1 / LY5 / LMG / LMF engine applications with compatible stock crankshaft main journals
- LH6 / LC9 / LY2 / L20 engine applications with compatible stock crankshaft main journals
- L33 / LQ4 / LQ9 / LR4 / LM7 / L59 engine applications with compatible stock crankshaft main journals
- LS4 / LH8 / LH9 engine applications with compatible stock crankshaft main journals
- LT1 / LT4 Gen V applications with compatible stock crankshaft main journals
- L83 / L86 / L84 / L87 / L8B / L82 / L8T Gen V applications with compatible stock crankshaft main journals
- Fitment note: Fits stock LS/LT crankshafts ground .010" undersize on the mains only; not for aftermarket crankshafts.
