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King Engine Bearings

King Engine Bearings

King SI-Series Main Bearings MB 557SI 020 Bearings, 1/2 Groove, .020 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

SKU: KINGMB557SI020

Main Bearings
King SI-Series Main Bearings MB 557SI 020 Bearings, 1/2 Groove, .020 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5
King Engine Bearings

King Engine Bearings

King SI-Series Main Bearings MB 557SI 020 Bearings, 1/2 Groove, .020 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

SKU: KINGMB557SI020

Main Bearings
A$64.51
IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.
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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

Data: v4.2 - Upd: 2026-10-16 06:01:45

Specifications

Product Attributes - Brand
King Engine Bearings
Product Attributes - Manufacturer's Part Number
MB 557SI 020
Product Attributes - Part Type
Main Bearings
Product Attributes - Product Line
King SI-Series Main Bearings
Product Attributes - UPC
611500404924
Product Attributes - Bearing Usage
Direct replacement
Product Attributes - Engine Crankshaft Undersize (in.)
0.020 in.
Product Attributes - Engine Crankshaft Undersize (mm)
0.50mm
Product Attributes - Grooved Bearing
Yes
Product Attributes - Groove Location
Upper
Product Attributes - Groove Style
1/2
Product Attributes - Thrust Bearing Oversize
Maximum
Product Attributes - Bearing Material
Bi-metal, silicon aluminum
Product Attributes - Quantity
Sold as a set of 5.

Reference Information

Brand Name/s King Engine Bearings
StreetFX SKU kingMB557SI020
SFX Item ID 4859217
Supplier Item Code 4859217
Manufacturer SKU MB557SI020
Manufacturer UPC 611500404924
Alternative References KEBMB557SI020, KGB-MB557SI020, 557SI

Compatibility

Application Data
  • MakeAVANTI
    ModelII
    SubmodelBASE
    Beginning Year1966
    Ending Year1969
    Engine TypeV8
    Liter5.3
    CID327
    CC5358
    Engine FamilyChevy small block Gen I
    Engine Size5.3L/327
    Application NotesHE; bimetal (aluminum silicon base), Crankshaft Undersize-020in, Flange STD+001in
    RegionUSA
  • MakeAVANTI
    ModelII
    SubmodelBASE
    Beginning Year1969
    Ending Year1972
    Engine TypeV8
    Liter5.7
    CID350
    CC5733
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    RegionUSA
  • MakeAVANTI
    ModelII
    SubmodelBASE
    Beginning Year1969
    Ending Year1980
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    RegionUSA
  • MakeAVANTI
    ModelII
    SubmodelBASE
    Beginning Year1981
    Ending Year1991
    Engine TypeV8
    Liter5.0
    CID305
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/305
    RegionUSA
  • MakeAVANTI
    ModelII
    SubmodelGT
    Beginning Year1985
    Ending Year1985
    Engine TypeV8
    Liter5.0
    CID305
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/305
    RegionUSA
  • MakeBIZZARRINI
    ModelGT AMERICA
    SubmodelBASE
    Beginning Year1966
    Ending Year1969
    Engine TypeV8
    Liter5.3
    CID327
    CC5358
    Engine FamilyChevy small block Gen I
    Engine Size5.3L/327
    Application NotesHE; bimetal (aluminum silicon base), Crankshaft Undersize-020in, Flange STD+001in
    RegionUSA
  • MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    Engine VIN CodeL
    RegionUSA
  • MakeBUICK
    ModelCENTURY
    SubmodelCUSTOM
    Beginning Year1977
    Ending Year1979
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    Engine VIN CodeL
    RegionUSA
  • MakeBUICK
    ModelCENTURY
    SubmodelSPECIAL
    Beginning Year1979
    Ending Year1979
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    Engine VIN CodeL
    RegionUSA
  • MakeBUICK
    ModelCOMMERCIAL CHASSIS
    SubmodelBASE
    Beginning Year1991
    Ending Year1991
    Engine TypeV8
    Liter5.0
    CID305
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/305
    Application NotesL03; bimetal (aluminum silicon base), Crankshaft Undersize-020in, Flange STD+001in
    Engine VIN CodeE
    RegionUSA
  • MakeBUICK
    ModelREGAL
    SubmodelBASE
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    Engine VIN CodeL
    RegionUSA
  • MakeBUICK
    ModelREGAL
    SubmodelSR
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    Engine VIN CodeL
    RegionUSA
  • MakeBUICK
    ModelROADMASTER
    SubmodelESTATE WAGON
    Beginning Year1991
    Ending Year1991
    Engine TypeV8
    Liter5.0
    CID305
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/305
    Application NotesL03; bimetal (aluminum silicon base), Crankshaft Undersize-020in, Flange STD+001in
    Engine VIN CodeE
    RegionUSA
  • MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1977
    Ending Year1979
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    Engine VIN CodeL
    RegionUSA
  • MakeBUICK
    ModelSKYLARK
    SubmodelCUSTOM
    Beginning Year1978
    Ending Year1979
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    Engine VIN CodeL
    RegionUSA
  • MakeBUICK
    ModelSKYLARK
    SubmodelSPORT
    Beginning Year1978
    Ending Year1978
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    Engine VIN CodeL
    RegionUSA
  • MakeBUICK
    ModelSKYLARK
    SubmodelSR
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    Engine VIN CodeL
    RegionUSA
  • MakeCADILLAC
    ModelBROUGHAM
    SubmodelBASE
    Beginning Year1991
    Ending Year1992
    Engine TypeV8
    Liter5.0
    CID305
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/305
    Application NotesL03; bimetal (aluminum silicon base), Crankshaft Undersize-020in, Flange STD+001in
    Engine VIN CodeE
    RegionUSA
  • MakeCADILLAC
    ModelBROUGHAM
    SubmodelD'ELEGANCE
    Beginning Year1991
    Ending Year1992
    Engine TypeV8
    Liter5.0
    CID305
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/305
    Application NotesL03; bimetal (aluminum silicon base), Crankshaft Undersize-020in, Flange STD+001in
    Engine VIN CodeE
    RegionUSA
  • MakeCADILLAC
    ModelESCALADE
    SubmodelBASE
    Beginning Year1999
    Ending Year2000
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    Application NotesL31; bimetal (aluminum silicon base), Crankshaft Undersize-020in, Flange STD+001in
    Engine VIN CodeR
    RegionUSA
  • MakeCHECKER
    ModelAEROBUS
    SubmodelBASE
    Beginning Year1967
    Ending Year1968
    Engine TypeV8
    Liter5.3
    CID327
    CC5358
    Engine FamilyChevy small block Gen I
    Engine Size5.3L/327
    Application NotesMA; bimetal (aluminum silicon base), Crankshaft Undersize-020in, Flange STD+001in
    RegionUSA
  • MakeCHECKER
    ModelAEROBUS
    SubmodelBASE
    Beginning Year1969
    Ending Year1974
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    RegionUSA
  • MakeCHECKER
    ModelDELUXE
    SubmodelBASE
    Beginning Year1969
    Ending Year1969
    Engine TypeV8
    Liter5.3
    CID327
    CC5358
    Engine FamilyChevy small block Gen I
    Engine Size5.3L/327
    Application NotesFJ; bimetal (aluminum silicon base), Crankshaft Undersize-020in, Flange STD+001in
    RegionUSA
  • MakeCHECKER
    ModelDELUXE
    SubmodelBASE
    Beginning Year1969
    Ending Year1970
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    RegionUSA
  • MakeCHECKER
    ModelMARATHON
    SubmodelAEROBUS
    Beginning Year1975
    Ending Year1975
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    RegionUSA

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