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Unpublished Item

JEGS Performance Products 25018 - JEGS Main Bearings



JEGS Performance Products 25018 - JEGS Main Bearings

JEGS Part Number: 555-25018

High-Performance Main Bearing Set
  • Small Block Chevy (Large Journal)
  • +.020"
  • $38.97
    Ships

    Specifications:

    Bearing Usage
    Performance
    Groove Location
    Upper
    Grooved Bearing
    Yes
    Crank Undersize (in.)
    0.02
    Engine Family
    Small Block
    Engine Make
    Chevy
    Engine Size
    283-358
    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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    1974 CHEVROLET MALIBU

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

    1986 PONTIAC FIREBIRD

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

    1978-1979 OLDSMOBILE OMEGA

    • EngineType: V8
    • SubModel: BASE

    1977 BUICK CENTURY

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

    1981 CHEVROLET MONTE CARLO

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

    1978 PONTIAC GRAND LEMANS

    • EngineType: V8
    • SubModel: SAFARI

    1975 CHEVROLET MONZA

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

    1975-1976 CHEVROLET MONTE CARLO

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

    1974-1975 CHEVROLET LAGUNA

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

    1979 OLDSMOBILE CUTLASS

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

    1977-1979 CHEVROLET CAMARO

    • EngineType: V8
    • SubModel: BASE

    1980 OLDSMOBILE CUTLASS SUPREME

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

    1987 CHEVROLET CAMARO

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

    1976 PONTIAC LEMANS

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

    1978-1979 BUICK SKYLARK

    • EngineType: V8
    • SubModel: BASE

    1972 CHEVROLET BISCAYNE

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

    1973 CHEVROLET NOVA

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

    1985-1988 CHEVROLET MONTE CARLO

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

    1978 OLDSMOBILE CUTLASS SALON

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

    1976 PONTIAC LEMANS

    • EngineType: ALL
    • SubModel: SPORT COUPE

    1984 CHEVROLET IMPALA

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

    1978-1979 CHEVROLET NOVA

    • EngineType: V8
    • SubModel: CUSTOM

    1978 OLDSMOBILE CUTLASS

    • Liter: 5.7
    • EngineType: V8
    • SubModel: VISTA CRUISER

    1973 CHEVROLET CORVETTE

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

    1980-1981 PONTIAC LAURENTIAN

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

    1986-1987 BUICK REGAL

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

    1984 CHEVROLET CAPRICE

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

    1980 OLDSMOBILE CUTLASS

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

    1976 CHEVROLET MONTE CARLO

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

    1973 CHEVROLET NOVA

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

    1991-1992 CHEVROLET CAPRICE

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

    1979-1980 PONTIAC GRAND PRIX

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

    1977 BUICK REGAL

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

    1990-1992 PONTIAC FIREBIRD

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

    1982-1983 PONTIAC GRAND LEMANS

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

    1983 OLDSMOBILE CUTLASS SUPREME

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

    1978 BUICK CENTURY

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

    1977 CHEVROLET CAMARO

    • EngineType: V8
    • SubModel: LT

    1977 PONTIAC GRAND LEMANS

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

    1990-1992 CHEVROLET CAMARO

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

    1984 OLDSMOBILE CUTLASS CALAIS

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

    1988 PONTIAC FIREBIRD

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

    1983-1984 PONTIAC GRAND PRIX

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

    1974-1975 CHEVROLET NOVA

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

    1978 PONTIAC GRAND LEMANS

    • EngineType: V8
    • SubModel: BASE

    1978-1979 BUICK SKYLARK

    • EngineType: V8
    • SubModel: CUSTOM

    1983-1984 PONTIAC BONNEVILLE

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

    1978-1979 BUICK CENTURY

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

    1972 CHEVROLET MONTE CARLO

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

    1978-1979 PONTIAC GRAND PRIX

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

    1979 CHEVROLET MALIBU

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

    1980 PONTIAC GRAND PRIX

    • Liter: 5.0
    • EngineType: V8
    • SubModel: SJ

    1979-1980 PONTIAC FIREBIRD

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

    1979-1980 OLDSMOBILE CUTLASS SUPREME

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

    1989-1992 CHEVROLET CAPRICE

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

    1990 CHEVROLET CAMARO

    • CC: 5031
    • Liter: 5.0
    • SubModel: IROC-Z
    • EngineType: V8

    1983 BUICK REGAL

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

    1982-1986 CHEVROLET CAMARO

    • EngineType: V8
    • SubModel: BASE

    1978-1979 PONTIAC SUNBIRD

    • EngineType: V8
    • SubModel: BASE

    1972 CHEVROLET KINGSWOOD

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

    1975 CHEVROLET CAMARO

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

    1977-1978 PONTIAC LEMANS

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

    1977 PONTIAC VENTURA

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

    1983 PONTIAC GRAND PRIX

    • Liter: 5.0
    • EngineType: V8
    • SubModel: LJ

    1978 CHEVROLET CORVETTE

    • EngineType: ALL
    • SubModel: BASE

    1979 CHEVROLET CORVETTE

    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: 4
    • CUI: 350
    • EngineType: V8

    1977 OLDSMOBILE OMEGA

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

    1976 PONTIAC LAURENTIAN

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

    1985-1987 PONTIAC GRAND PRIX

    • EngineType: V8
    • SubModel: BROUGHAM

    1977 PONTIAC PHOENIX

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

    1977 CHEVROLET CAPRICE

    • EngineType: V8
    • SubModel: CLASSIC

    1977 PONTIAC FIREBIRD

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

    1980-1983 CHEVROLET CAPRICE

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

    1977-1979 OLDSMOBILE STARFIRE

    • EngineType: V8
    • SubModel: BASE

    1977 BUICK SKYLARK

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

    1983 CHEVROLET MALIBU

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

    1978 BUICK CENTURY

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

    1972 CHEVROLET BROOKWOOD

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

    1978-1979 OLDSMOBILE OMEGA

    • EngineType: V8
    • SubModel: BROUGHAM

    1985-1987 OLDSMOBILE CUTLASS SUPREME

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

    1977-1979 CHEVROLET MONZA

    • EngineType: V8
    • SubModel: 2+2

    1980-1981 CHEVROLET CAPRICE

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

    1976 CHEVROLET MALIBU

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

    1986 PONTIAC FIREBIRD

    • Liter: 5.0
    • SubModel: S/E
    • CUI: 305
    • EngineType: V8

    1978-1979 PONTIAC LAURENTIAN

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

    1978 PONTIAC FIREBIRD

    • EngineType: V8
    • SubModel: BASE

    1992 OLDSMOBILE CUSTOM CRUISER

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

    1988 CHEVROLET CAMARO

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

    1977 BUICK SKYLARK

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

    1973 CHEVROLET LAGUNA

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

    1973 CHEVROLET LAGUNA

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

    1979-1980 BUICK CENTURY

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

    1977 OLDSMOBILE OMEGA

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

    1974-1975 CHEVROLET MALIBU

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

    1985-1990 CHEVROLET CAPRICE

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

    1974 CHEVROLET MONTE CARLO

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

    1976 CHEVROLET MALIBU

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

    1976 CHEVROLET CAMARO

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

    1972 CHEVROLET BEL AIR

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

    1981-1983 CHEVROLET IMPALA

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