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Unpublished Item

JEGS Performance Products 25015 - JEGS Main Bearings



JEGS Performance Products 25015 - JEGS Main Bearings

Part Number: 555-25015

High-Performance Main Bearing Set
  • Small Block Chevy (Large Journal)
  • Standard Size
  • $38.97
    Ships

    Specifications:

    Bearing Usage
    Performance
    Groove Location
    Upper
    Grooved Bearing
    Yes
    Crank Undersize (in.)
    Stock
    Engine Family
    Small Block
    Engine Make
    Chevy
    Engine Size
    283-355
    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?

    Narrow Results

    1978 BUICK CENTURY

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

    1972 CHEVROLET IMPALA

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

    1977 OLDSMOBILE OMEGA

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

    1982-1986 PONTIAC FIREBIRD TRANS AM

    • EngineType: ALL
    • SubModel: ALL

    1977 BUICK SKYLARK

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

    1979-1980 CHEVROLET MALIBU

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

    1985 PONTIAC FIREBIRD

    • EngineType: V8
    • SubModel: S/E

    1972 CHEVROLET CORVETTE

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

    1974 CHEVROLET MONTE CARLO

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

    1977 OLDSMOBILE OMEGA

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

    1978-1979 PONTIAC SUNBIRD

    • EngineType: V8
    • SubModel: BASE

    1977-1979 CHEVROLET IMPALA

    • EngineType: V8
    • SubModel: BASE

    1991-1992 CHEVROLET CAPRICE

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

    1978 CHEVROLET MONTE CARLO

    • EngineType: V8
    • SubModel: BASE

    1989-1992 PONTIAC FIREBIRD TRANS AM

    • Liter: 5.0
    • EngineType: V8
    • SubModel: GTA

    1978 PONTIAC FIREBIRD

    • EngineType: V8
    • SubModel: ESPRIT

    1990 CHEVROLET CAMARO

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

    1980 OLDSMOBILE CUTLASS

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

    1972 CHEVROLET TOWNSMAN

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

    1983-1984 PONTIAC GRAND PRIX

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

    1983 BUICK REGAL

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

    1973 CHEVROLET CHEVELLE

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

    1973 CHEVROLET MONTE CARLO

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

    1976-1977 PONTIAC LEMANS

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

    1979 CHEVROLET CORVETTE

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

    1978 OLDSMOBILE CUTLASS SUPREME

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

    1977-1979 CHEVROLET MONZA

    • EngineType: V8
    • SubModel: BASE

    1990-1992 CHEVROLET CAMARO

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

    1973 CHEVROLET CAMARO

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

    1979-1980 PONTIAC GRAND PRIX

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

    1979 BUICK CENTURY

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

    1976 PONTIAC LEMANS

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

    1981 PONTIAC CATALINA

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

    1977 OLDSMOBILE OMEGA

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

    1981 CHEVROLET IMPALA

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

    1974-1975 CHEVROLET IMPALA

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

    1977 BUICK SKYLARK

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

    1978-1979 OLDSMOBILE OMEGA

    • EngineType: V8
    • SubModel: BASE

    1986 PONTIAC PARISIENNE

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

    1985-1988 CHEVROLET MONTE CARLO

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

    1980 PONTIAC CATALINA

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

    1978-1980 PONTIAC GRAND AM

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

    1979 CHEVROLET MALIBU

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

    1976 CHEVROLET NOVA

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

    1976 CHEVROLET CAMARO

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

    1978 OLDSMOBILE CUTLASS SUPREME

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

    1977 PONTIAC VENTURA

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

    1973 CHEVROLET CAPRICE

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

    1977 BUICK SKYLARK

    • Liter: 5.0
    • EngineType: V8
    • SubModel: S

    1978 PONTIAC GRAND LEMANS

    • EngineType: V8
    • SubModel: BASE

    1978 PONTIAC GRAND LEMANS

    • EngineType: V8
    • SubModel: SAFARI

    1975-1976 CHEVROLET MONTE CARLO

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

    1974 CHEVROLET BEL AIR

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

    1978-1979 PONTIAC GRAND PRIX

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

    1981 PONTIAC GRAND LEMANS

    • Liter: 5.0
    • EngineType: V8
    • SubModel: LE

    1975-1976 CHEVROLET CORVETTE

    • EngineType: ALL
    • SubModel: BASE

    1978 CHEVROLET CAPRICE

    • EngineType: V8
    • SubModel: BASE

    1983 PONTIAC GRAND LEMANS

    • EngineType: V8
    • SubModel: BR

    1982 PONTIAC FIREBIRD

    • EngineType: V8
    • SubModel: S/E

    1985 BUICK REGAL

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

    1980 BUICK CENTURY

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

    1984 OLDSMOBILE CUTLASS CALAIS

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

    1979-1980 OLDSMOBILE CUTLASS SALON

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

    1977 CHEVROLET CAMARO

    • EngineType: V8
    • SubModel: LT

    1976 CHEVROLET MALIBU

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

    1979-1980 OLDSMOBILE CUTLASS SALON

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

    1974-1975 CHEVROLET NOVA

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

    1986-1987 BUICK REGAL

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

    1984 PONTIAC BONNEVILLE

    • Liter: 5.0
    • EngineType: V8
    • SubModel: LE

    1978-1979 PONTIAC PHOENIX

    • EngineType: V8
    • SubModel: BASE

    1980-1982 CHEVROLET MALIBU

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

    1977-1980 PONTIAC LAURENTIAN

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

    1977-1979 OLDSMOBILE STARFIRE

    • EngineType: V8
    • SubModel: BASE

    1977 BUICK SKYLARK

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

    1977-1978 CHEVROLET MALIBU

    • EngineType: V8
    • SubModel: BASE

    1984-1988 CHEVROLET MONTE CARLO

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

    1983-1984 PONTIAC FIREBIRD

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

    1976 CHEVROLET CAMARO

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

    1985-1990 CHEVROLET CAPRICE

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

    1984 CHEVROLET MONTE CARLO

    • EngineType: ALL
    • SubModel: SS

    1981 PONTIAC LAURENTIAN

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

    1980-1981 BUICK CENTURY

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

    1981 PONTIAC PARISIENNE

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

    1977-1979 CHEVROLET NOVA

    • EngineType: V8
    • SubModel: BASE

    1981-1982 CHEVROLET MONTE CARLO

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

    1978 BUICK REGAL

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

    1978-1979 PONTIAC FIREBIRD

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

    1979-1980 CHEVROLET MONTE CARLO

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

    1972 CHEVROLET CAPRICE

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

    1985-1987 OLDSMOBILE CUTLASS SUPREME

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

    1976 CHEVROLET CAMARO

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

    1978-1979 PONTIAC LAURENTIAN

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

    1983-1984 PONTIAC FIREBIRD

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

    1989-1992 PONTIAC FIREBIRD

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

    1972 CHEVROLET MONTE CARLO

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

    1980 CHEVROLET CORVETTE

    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: 8
    • CUI: 350
    • EngineType: V8

    1977 BUICK CENTURY

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

    1990-1992 PONTIAC FIREBIRD

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

    1972 CHEVROLET CAMARO

    • Liter: 5.7
    • Aspiration: N
    • SubModel: Z28
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8

    1972 CHEVROLET CAMARO

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