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Speed-Pro Competition Series Main Bearings 140M20 Bearings, Series, 0.020 in. Crankshaft Undersize, Tri Metal, 3/4 Groove, Chevy, 400, Set of 5

SKU: SLP140M20

Main Bearings

Speed-Pro Competition Series Main Bearings 140M20 Bearings, Series, 0.020 in. Crankshaft Undersize, Tri Metal, 3/4 Groove, Chevy, 400, Set of 5

SKU: SLP140M20

Main Bearings
A$274.56
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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Description

If you're building a serious performance engine, then you'll want to consider Speed-Pro Competition Series main bearings. They were developed in NASCAR and Pro Stock competition, so you know they're tough. The bearings are built on premium 1020AK steel backings and overlaid with Speed-Pro's super-duty H-14 alloy. That layer is then covered with a nickel barrier, followed by a thin lead-tin-copper overplate. However, unlike other performance bearings, there is no flash tin layer on top of that. Speed-Pro's engineers have determined that such a layer can actually move around under high loads—sometimes with undesirable consequences. Depending on the application, these main bearings have oil grooves for enhanced lubrication, while maintaining a maximum bearing surface area. They also feature Speed-Pro's exclusive contoured-flange thrust bearing technology for higher thrust-loading capacity. Competition Series main bearings are available in nearly a hundred configurations for countless vehicle and engine applications.

Part Type

Main Bearing Set

Data: v4.2 - Upd: 2026-09-30 14:11:27

Specifications

Product Attributes - Brand
Sealed Power
Product Attributes - Manufacturer's Part Number
140M20
Product Attributes - Part Type
Main Bearings
Product Attributes - Product Line
Speed-Pro Competition Series Main Bearings
Product Attributes - UPC
724956233427
Product Attributes - Bearing Usage
Performance
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 and lower
Product Attributes - Groove Style
3/4
Product Attributes - Thrust Bearing Oversize
Stock
Product Attributes - Bearing Material
Tri-metal copper-lead alloy
Product Attributes - Quantity
Sold as a set.

Reference Information

Brand Name/s Sealed Power
StreetFX SKU slp140M20
SFX Item ID 5029594
Supplier Item Code 5029594
Manufacturer SKU 140M20
Manufacturer UPC 724956233427
Alternative References SEA140M20

Compatibility

Application Data
  • MakeCHEVROLET
    Beginning Year1970
    Ending Year1980
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1970
    Ending Year1971
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1972
    Ending Year1972
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeR
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1972
    Ending Year1974
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeR
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1973
    Ending Year1974
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeR
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1973
    Ending Year1974
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeU
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1973
    Ending Year1974
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeU
  • MakeCHEVROLET
    ModelBEL AIR
    SubmodelBASE
    Beginning Year1975
    Ending Year1975
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeU
  • MakeCHEVROLET
    ModelBISCAYNE
    SubmodelBASE
    Beginning Year1970
    Ending Year1971
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
  • MakeCHEVROLET
    ModelBISCAYNE
    SubmodelBASE
    Beginning Year1972
    Ending Year1972
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeR
  • MakeCHEVROLET
    ModelBISCAYNE
    SubmodelBASE
    Beginning Year1972
    Ending Year1972
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeR
  • MakeCHEVROLET
    ModelBROOKWOOD
    SubmodelBASE
    Beginning Year1970
    Ending Year1971
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
  • MakeCHEVROLET
    ModelBROOKWOOD
    SubmodelBASE
    Beginning Year1972
    Ending Year1972
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeR
  • MakeCHEVROLET
    ModelBROOKWOOD
    SubmodelBASE
    Beginning Year1972
    Ending Year1972
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeR
  • MakeCHEVROLET
    ModelC10
    SubmodelBIG TEN
    Beginning Year1980
    Ending Year1980
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeX
  • MakeCHEVROLET
    ModelC10
    SubmodelCHEYENNE
    Beginning Year1976
    Ending Year1976
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeU
  • MakeCHEVROLET
    ModelC10
    SubmodelCHEYENNE
    Beginning Year1977
    Ending Year1979
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeR
  • MakeCHEVROLET
    ModelC10
    SubmodelCHEYENNE
    Beginning Year1980
    Ending Year1980
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeX
  • MakeCHEVROLET
    ModelC10
    SubmodelCUSTOM DELUXE
    Beginning Year1976
    Ending Year1976
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeU
  • MakeCHEVROLET
    ModelC10
    SubmodelCUSTOM DELUXE
    Beginning Year1977
    Ending Year1979
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeR
  • MakeCHEVROLET
    ModelC10
    SubmodelCUSTOM DELUXE
    Beginning Year1980
    Ending Year1980
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeX
  • MakeCHEVROLET
    ModelC10
    SubmodelSCOTTSDALE
    Beginning Year1976
    Ending Year1976
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeU
  • MakeCHEVROLET
    ModelC10
    SubmodelSCOTTSDALE
    Beginning Year1977
    Ending Year1979
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeR
  • MakeCHEVROLET
    ModelC10
    SubmodelSCOTTSDALE
    Beginning Year1980
    Ending Year1980
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeX
  • MakeCHEVROLET
    ModelC10
    SubmodelSILVERADO
    Beginning Year1976
    Ending Year1976
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Engine VIN CodeU

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