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King Engine Bearings

King Engine Bearings

King SI-Series Main Bearings MB 557SISTDX Bearings, 1/2 Groove, .001 in. Thinner, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

SKU: KINGMB_557SISTDX

Main Bearings
King SI-Series Main Bearings MB 557SISTDX Bearings, 1/2 Groove, .001 in. Thinner, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5
King Engine Bearings

King Engine Bearings

King SI-Series Main Bearings MB 557SISTDX Bearings, 1/2 Groove, .001 in. Thinner, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

SKU: KINGMB_557SISTDX

Main Bearings
A$64.12
BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.
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Description

King SI-Series main bearings are recommended for OE applications. These replacement bearings are designed for aftermarket gasoline or diesel engine rebuilding—and performance engines with factory crankshafts. The bearings have an improved crankshaft finish for reducing microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts. King SI-Series main bearings feature improved oil clearance to reduce wear and increase engine life, which in turn reduces operating noise, vibration, and excess oil flow. Order the bearing set designed for fitment on your make and model.

Part Type

Main Bearing Set - SBC

Data: v4.2 - Upd: 2026-10-14 17:10:12

Specifications

Product Attributes - Brand
King Engine Bearings
Product Attributes - Manufacturer's Part Number
MB 557SISTDX
Product Attributes - Part Type
Main Bearings
Product Attributes - Product Line
King SI-Series Main Bearings
Product Attributes - UPC
611500417917
Product Attributes - Bearing Usage
Direct replacement
Product Attributes - Engine Crankshaft Undersize (in.)
Stock
Product Attributes - Engine Crankshaft Undersize (mm)
Stock
Product Attributes - Grooved Bearing
Yes
Product Attributes - Groove Location
Upper
Product Attributes - Groove Style
1/2
Product Attributes - Thrust Bearing Oversize
Stock
Product Attributes - Bearing Material
Bi-metal, silicon aluminum
Product Attributes - Quantity
Sold as a set of 5.
Product Attributes - Notes
Bearings have 0.001 in. more clearance than stock

Reference Information

Brand Name/s King Engine Bearings
StreetFX SKU kingMB_557SISTDX
SFX Item ID 4858887
Supplier Item Code 4858887
Manufacturer SKU MB 557SISTDX
Manufacturer UPC 611500417917
Alternative References KEBMB557SISTDX, KGB-MB557SISTDX, 557SISTDX

Compatibility

Application Data
  • MakeCHEVROLET
    Beginning Year1967
    Ending Year2002
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
  • MakeCHEVROLET
    Beginning Year1968
    Ending Year1969
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size4.9L/302
  • MakeCHEVROLET
    Beginning Year1968
    Ending Year1969
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size5.4L/327
  • MakeCHEVROLET
    Beginning Year1968
    Ending Year1973
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/307
  • MakeCHEVROLET
    Beginning Year1975
    Ending Year1976
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size4.3L/262
  • MakeCHEVROLET
    Beginning Year1976
    Ending Year1999
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/305
  • MakeCHEVROLET
    Beginning Year1979
    Ending Year1982
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size4.4L/267

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