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JEGS Performance Products 25019 - JEGS Main Bearings



JEGS Performance Products 25019 - JEGS Main Bearings

JEGS Part Number: 555-25019

High-Performance Main Bearing Set
  • Small Block Chevy (Large Journal)
  • +.030"
  • $56.99
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    Specifications:

    Bearing Usage
    Performance
    Groove Location
    Upper
    Grooved Bearing
    Yes
    Crank Undersize (in.)
    0.03
    Engine Family
    Small Block
    Engine Make
    Chevy
    Engine Size
    283-359
    Material
    Bi-metal, silicon aluminum

    Traditional bearings have three layers: steel, copper-lead, and thin babbitt overlay (only 0.0005" to 0.0008"). JEGS Main Bearings in a Performance or High-Performance series have two layers: high-strength steel and bonded silicon, tin, and copper in an aluminum matrix (0.015" thick). Because an alloy, properties are maintained through its entire depth to deliver consistent, reliable output. Additionally, micro-fine machined High-Performance Bearings have chamfered oil holes and offer a copper-lead version for Chevy Gen III/IV LS Engines only. Bearings are sold in sets for Chevy and Ford applications.

    High Load Capacity
    Aluminum silicon bearings withstand the stress of high-performance engines. JEGS Bearings are made from the same metallurgical alloy so cars that have standard bearings benefit from this alloy used in race engines.

    Temperature Resistance
    This alloy's melting/fatigue point is 450°+ F (100° more than the thin babbitt overlay of tri-metal bearings). This means extra protection against localized overheating due to misalignment, detonation, overloading, loss of coolant, etc.

    Particle Embedability
    More than half of engine bearing failure is caused by metallic particles that scratch crank journals and weaken or tear thin bearing overlays. Because aluminum silicon overlay is much thicker than babbitt in tri-metal bearings (0.015" vs. 0.0008"), it provides 18 times more embedability to trap particles to prevent crank journal scratches. This is especially true for particles over 0.0004", which cause most of the damage.

    Conformability
    The thicker aluminum silicon layer allows bearings to better conform to problems, such as metal-to-metal contact due to misalignment. Greater conformability also means fewer bearing failures.

    Control of Wall Tolerance
    Bearing-to-journal clearance is affected by several factors. We've alleviated concerns about inconsistent shell-to-shell bearing wall thickness by using statistical control methods to minimize wall thickness variation. JEGS Engine Bearing thickness varies no more than 0.00010". Other manufacturers produce bearings with wall thickness at the crown that varies as much as 0.00025".

    Does this fit your vehicle?

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    1977 PONTIAC GRAND LEMANS

    • EngineType: V8
    • SubModel: LE

    1978 PONTIAC LAURENTIAN

    • EngineType: V8
    • SubModel: ALL

    1978 BUICK CENTURY

    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 305
    • EngineType: V8

    1980-1981 PONTIAC FIREBIRD TRANS AM

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1976 CHEVROLET MALIBU

    • Liter: 5.7
    • SubModel: CLASSIC
    • CUI: 350
    • EngineType: V8

    1989-1992 PONTIAC FIREBIRD

    • EngineType: V8
    • SubModel: BASE

    1978 CHEVROLET CORVETTE

    • EngineType: ALL
    • SubModel: BASE

    1977 CHEVROLET MONTE CARLO

    • EngineType: ALL
    • SubModel: BASE

    1978 PONTIAC LEMANS

    • EngineType: V8
    • SubModel: BASE

    1977 OLDSMOBILE OMEGA

    • Liter: 5.0
    • EngineType: V8
    • SubModel: F85

    1979-1980 OLDSMOBILE CUTLASS SUPREME

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BROUGHAM

    1985-1986 PONTIAC BONNEVILLE

    • EngineType: V8
    • SubModel: BROUGHAM

    1991 BUICK ROADMASTER

    • EngineType: ALL
    • SubModel: ESTATE

    1979-1980 OLDSMOBILE CUTLASS CALAIS

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1976 CHEVROLET MALIBU

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1978 PONTIAC GRAND LEMANS

    • EngineType: ALL
    • SubModel: SA

    1979-1982 CHEVROLET MALIBU

    • Liter: 5.0
    • EngineType: V8
    • SubModel: CLASSIC

    1972 CHEVROLET KINGSWOOD

    • Liter: 5.7
    • SubModel: ESTATE
    • CUI: 350
    • EngineType: V8

    1983 OLDSMOBILE CUTLASS SUPREME

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8

    1978 OLDSMOBILE CUTLASS SALON

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8

    1977 BUICK CENTURY

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1978 PONTIAC LEMANS

    • EngineType: V8
    • SubModel: SAFARI

    1978 CHEVROLET MONTE CARLO

    • EngineType: V8
    • SubModel: BASE

    1977 CHEVROLET CORVETTE

    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8

    1984 OLDSMOBILE CUTLASS CALAIS

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8

    1977 BUICK SKYLARK

    • Liter: 5.7
    • Aspiration: N
    • SubModel: SR
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8

    1984 CHEVROLET MONTE CARLO

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1977 CHEVROLET CAPRICE

    • EngineType: V8
    • SubModel: CLASSIC

    1981 CHEVROLET MONTE CARLO

    • EngineType: V8
    • SubModel: ALL

    1982-1985 PONTIAC PARISIENNE

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BROUGHAM

    1990-1992 CHEVROLET CAMARO

    • EngineType: V8
    • SubModel: RS

    1974-1975 CHEVROLET MALIBU

    • Liter: 5.7
    • SubModel: CLASSIC
    • CUI: 350
    • EngineType: V8

    1978 OLDSMOBILE CUTLASS SUPREME

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8

    1977 BUICK REGAL

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1978-1979 BUICK CENTURY

    • Liter: 5.7
    • EngineType: V8
    • SubModel: CUSTOM

    1978 BUICK LESABRE

    • Liter: 5.0
    • EngineType: V8
    • SubModel: CUSTOM

    1977 OLDSMOBILE OMEGA

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1972 CHEVROLET CHEVELLE

    • Liter: 5.7
    • SubModel: CONCOURS
    • CUI: 350
    • EngineType: V8

    1978-1979 PONTIAC FIREBIRD

    • Liter: 5.7
    • EngineType: V8
    • SubModel: FORMULA

    1977 BUICK CENTURY

    • Liter: 5.0
    • EngineType: V8
    • SubModel: CUSTOM

    1980 CHEVROLET CAMARO

    • Liter: 5.7
    • EngineType: V8
    • SubModel: BASE

    1978-1979 BUICK SKYLARK

    • EngineType: V8
    • SubModel: S

    1978-1979 BUICK SKYLARK

    • EngineType: V8
    • SubModel: CUSTOM

    1982-1983 BUICK REGAL

    • Liter: 5.0
    • EngineType: V8
    • SubModel: ESTATE WAGON

    1977 PONTIAC PARISIENNE

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1979-1980 PONTIAC GRAND LEMANS

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1977 PONTIAC PHOENIX

    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8

    1973 CHEVROLET BEL AIR

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1987 CHEVROLET CAPRICE

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • EngineType: V8

    1987 PONTIAC FIREBIRD TRANS AM

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1979-1980 PONTIAC FIREBIRD

    • Liter: 5.0
    • EngineType: V8
    • SubModel: ESPRIT

    1983-1984 PONTIAC BONNEVILLE

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BROUGHAM

    1976 CHEVROLET LAGUNA

    • Liter: 5.7
    • EngineType: V8
    • SubModel: S3

    1979 CHEVROLET MALIBU

    • Liter: 5.7
    • Aspiration: N
    • SubModel: CLASSIC
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8

    1980 PONTIAC CATALINA

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1976 CHEVROLET MALIBU

    • Liter: 5.0
    • EngineType: V8
    • SubModel: CLASSIC

    1991-1992 CHEVROLET CAPRICE

    • Liter: 5.0
    • EngineType: V8
    • SubModel: CLASSIC LTZ

    1981 PONTIAC PARISIENNE

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8

    1979 CHEVROLET CAPRICE

    • Liter: 5.7
    • SubModel: CLASSIC
    • CUI: 350
    • EngineType: V8

    1977 OLDSMOBILE OMEGA

    • Liter: 5.7
    • Aspiration: N
    • SubModel: BROUGHAM
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8

    1985-1986 OLDSMOBILE CUTLASS

    • EngineType: ALL
    • SubModel: ALL

    1980-1981 PONTIAC LAURENTIAN

    • Liter: 5.0
    • EngineType: V8
    • SubModel: SAFARI

    1976 PONTIAC GRAND LEMANS

    • EngineType: ALL
    • SubModel: LE

    1976-1977 PONTIAC LEMANS

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1979 OLDSMOBILE CUTLASS

    • Liter: 5.0
    • EngineType: V8
    • SubModel: VISTA CRUISER

    1977 PONTIAC VENTURA

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1985-1988 CHEVROLET MONTE CARLO

    • EngineType: V8
    • SubModel: BASE

    1976 CHEVROLET MALIBU

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1977 CHEVROLET IMPALA

    • EngineType: V8
    • SubModel: CUSTOM

    1977 BUICK SKYLARK

    • Liter: 5.0
    • EngineType: V8
    • SubModel: SR

    1975 CHEVROLET CAMARO

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1973 CHEVROLET LAGUNA

    • Liter: 5.7
    • SubModel: ESTATE
    • CUI: 350
    • EngineType: V8

    1979-1980 OLDSMOBILE CUTLASS SALON

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1972 CHEVROLET IMPALA

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1985-1987 PONTIAC GRAND PRIX

    • EngineType: V8
    • SubModel: BROUGHAM

    1979 PONTIAC FIREBIRD

    • Liter: 5.7
    • EngineType: V8
    • SubModel: ESPRIT

    1977 PONTIAC VENTURA

    • Liter: 5.7
    • Aspiration: N
    • SubModel: SJ
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8

    1980-1985 CHEVROLET IMPALA

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1974 CHEVROLET BEL AIR

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1986-1987 BUICK REGAL

    • Liter: 5.0
    • SubModel: LIMITED
    • CUI: 305
    • EngineType: V8

    1977 BUICK CENTURY

    • Liter: 5.7
    • SubModel: CUSTOM
    • CUI: 350
    • EngineType: V8

    1978 BUICK CENTURY

    • Liter: 5.0
    • SubModel: LIMITED
    • CUI: 305
    • EngineType: V8

    1991 OLDSMOBILE CUSTOM CRUISER

    • EngineType: ALL
    • SubModel: ALL

    1984 BUICK REGAL

    • EngineType: V8
    • SubModel: BASE

    1973 CHEVROLET NOVA

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1988 CHEVROLET CAMARO

    • EngineType: V8
    • SubModel: BASE

    1980 OLDSMOBILE CUTLASS

    • Liter: 5.0
    • EngineType: V8
    • SubModel: LS

    1980 CHEVROLET CORVETTE

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1973 CHEVROLET CAMARO

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1977 OLDSMOBILE OMEGA

    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8

    1977 OLDSMOBILE DELTA 88

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1990 CHEVROLET CAMARO

    • Liter: 5.0
    • EngineType: V8
    • SubModel: IROC-Z

    1977-1978 CHEVROLET MALIBU

    • EngineType: V8
    • SubModel: CLASSIC

    1978 BUICK REGAL

    • Liter: 5.0
    • SubModel: LIMITED
    • CUI: 305
    • EngineType: V8

    1985-1986 PONTIAC BONNEVILLE

    • EngineType: V8
    • SubModel: LE

    1977 OLDSMOBILE DELTA 88

    • Liter: 5.7
    • SubModel: ROYALE
    • CUI: 350
    • EngineType: V8

    1974-1975 CHEVROLET MALIBU

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1976 CHEVROLET IMPALA

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1979-1980 PONTIAC FIREBIRD

    • Liter: 5.0
    • EngineType: V8
    • SubModel: BASE

    1978 OLDSMOBILE CUTLASS

    • Liter: 5.0
    • SubModel: VISTA CRUISER
    • CUI: 305
    • EngineType: V8
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