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Unpublished Item

JEGS Performance Products 25050 - JEGS Main Bearings



JEGS Performance Products 25050 - JEGS Main Bearings

JEGS Part Number: 555-25050

Performance Main Bearing Set
  • Small Block Ford
  • Standard Size
  • $19.99
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    Specifications:

    Bearing Usage
    Performance
    Groove Location
    Upper
    Grooved Bearing
    Yes
    Crank Undersize (in.)
    Stock
    Engine Family
    Small Block
    Engine Make
    Ford
    Engine Size
    289-351W
    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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    1990 FORD BRONCO

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

    1969 MERCURY CYCLONE

    • Liter: 5.0
    • EngineType: V8
    • SubModel: CJ

    1983-1986 FORD F-150

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

    1978-1980 LINCOLN VERSAILLES

    • EngineType: ALL
    • SubModel: ALL

    1990-1991 MERCURY GRAND MARQUIS

    • EngineType: ALL
    • SubModel: BASE

    1965 FORD FALCON SEDAN DELIVERY

    • CC: 4727
    • Liter: 4.7
    • SubModel: BASE
    • CUI: 289
    • EngineType: V8

    1979-1982 FORD E-150 ECONOLINE

    • Liter: 5.0
    • EngineType: V8
    • SubModel: CLUB PASSENGER WAGON

    1977-1983 FORD F-250

    • Liter: 5.0
    • EngineType: V8
    • SubModel: SUPER CAB

    1964-1967 FORD CUSTOM 500

    • Liter: 4.7
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    1975-1978 FORD MUSTANG II

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8

    1968-1974 FORD RANCHERO

    • Liter: 5.0
    • EngineType: V8
    • SubModel: 500

    1982-1983 FORD F-100

    • EngineType: V8
    • SubModel: BASE

    1969 MERCURY MONTEGO

    • Liter: 5.0
    • EngineType: V8
    • SubModel: MX

    1977-1979 FORD LTD II

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

    1993 FORD BRONCO

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

    1969 FORD RANCH WAGON

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

    1996-2001 FORD MOTORHOME

    • EngineType: ALL
    • SubModel: CLASS C; E-350

    1966-1967 FORD COUNTRY SEDAN

    • CC: 4727
    • Liter: 4.7
    • SubModel: BASE
    • CUI: 289
    • EngineType: V8

    1981 LINCOLN TOWN CAR

    • EngineType: ALL
    • SubModel: ALL

    1979-1981 MERCURY GRAND MARQUIS

    • Liter: 5.0
    • EngineType: V8
    • SubModel: COLONY PARK

    1975-1976 FORD P-400 VAN

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

    1968 MERCURY CYCLONE

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8

    1976 FORD P-350 VAN

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

    1969-1986 FORD F-250

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

    1977-1979 FORD LTD

    • Liter: 5.0
    • EngineType: V8
    • SubModel: LANDAU

    1968-1974 FORD E-200 ECONOLINE

    • EngineType: V8
    • SubModel: CARGO

    1979-1982 FORD E-150 ECONOLINE

    • Liter: 5.0
    • EngineType: V8
    • SubModel: SUPER CARGO

    1970-1973 FORD MUSTANG

    • Liter: 5.0
    • EngineType: V8
    • SubModel: MACH 1

    1981-1982 FORD E-150 ECONOLINE

    • Liter: 5.0
    • EngineType: V8
    • SubModel: SUPER PASSENGER WAGON

    1981 FORD F-100

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

    1963 FORD COUNTRY SQUIRE

    • Liter: 4.7
    • EngineType: V8
    • SubModel: BASE

    1980-1982 FORD BRONCO

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

    1977-1981 FORD THUNDERBIRD

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

    1971-1972 FORD E-300 ECONOLINE

    • EngineType: V8
    • SubModel: CUSTOM PASSENGER WAGON

    1977 LINCOLN VERSAILLES

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

    1970 FORD LTD

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8

    1986 MERCURY GRAND MARQUIS

    • Liter: 5.0
    • EngineType: V8
    • SubModel: COLONY PARK

    1969-1973 FORD BRONCO

    • EngineType: V8
    • SubModel: WAGON

    1971 FORD MUSTANG

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8

    1982 MERCURY CAPRI

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

    1969-1974 FORD F-100 PICKUP (CANADIAN)

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

    1968 FORD FALCON

    • Liter: 4.7
    • SubModel: BASE
    • CUI: 289
    • EngineType: V8

    1982-1983 FORD MUSTANG

    • EngineType: ALL
    • SubModel: GT

    1969 FORD COUNTRY SEDAN

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

    1974 FORD GRAN TORINO

    • Liter: 5.0
    • SubModel: BROUGHAM
    • CUI: 302
    • EngineType: V8

    1968 MERCURY COUGAR

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8

    1970-1971 FORD TORINO

    • Liter: 5.0
    • SubModel: SQUIRE
    • CUI: 302
    • EngineType: V8

    1987-1992 LINCOLN MARK VII

    • EngineType: ALL
    • SubModel: ALL

    1978-1979 FORD FAIRMONT

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8

    1984 MERCURY CAPRI

    • Liter: 5.0
    • SubModel: RS
    • CUI: 302
    • EngineType: V8

    1983-1988 FORD THUNDERBIRD

    • EngineType: V8
    • SubModel: BASE

    1969-1972 FORD BRONCO

    • EngineType: V8
    • SubModel: BASE

    1996 FORD BRONCO

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

    1968 FORD TORINO

    • Liter: 4.7
    • SubModel: BASE
    • CUI: 289
    • EngineType: V8

    1990 LINCOLN TOWN CAR

    • EngineType: ALL
    • SubModel: BASE

    1964-1965 FORD COUNTRY SQUIRE

    • CC: 4727
    • Liter: 4.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: A
    • CUI: 289
    • EngineType: V8

    1969 FORD GT40

    • Liter: 4.7
    • EngineType: V8
    • SubModel: MK III

    1987-1989 LINCOLN TOWN CAR

    • EngineType: ALL
    • SubModel: ALL

    1963 FORD GALAXIE

    • Liter: 4.7
    • EngineType: V8
    • SubModel: BASE

    1963-1964 FORD CLUB CARGO

    • Liter: 4.7
    • EngineType: V8
    • SubModel: BASE

    1979 MERCURY CAPRI

    • EngineType: V8
    • SubModel: GHIA

    1983-1984 FORD E-250 ECONOLINE

    • Liter: 5.0
    • EngineType: V8
    • SubModel: XL

    1992-1996 FORD F-250 PICKUP

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

    1969 FORD TORINO

    • Liter: 5.0
    • EngineType: V8
    • SubModel: SQUIRE

    1983 FORD E-250 ECONOLINE

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

    1980 LINCOLN CONTINENTAL

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

    1968 FORD BRONCO

    • Liter: 4.7
    • SubModel: WAGON
    • CUI: 289
    • EngineType: V8

    1978-1979 MERCURY MONARCH

    • EngineType: V8
    • SubModel: BASE

    1998-2001 MERCURY MOUNTAINEER

    • EngineType: V8
    • SubModel: BASE

    1964-1967 FORD FALCON

    • CC: 4727
    • Liter: 4.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 289
    • EngineType: V8

    1982 LINCOLN CONTINENTAL

    • EngineType: V8
    • SubModel: BASE

    1968-1973 FORD E-300 ECONOLINE

    • EngineType: V8
    • SubModel: CARGO

    1996-2001 FORD EXPLORER

    • EngineType: V8
    • SubModel: BASE

    1987-1989 FORD E-150 ECONOLINE

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

    1968 FORD BRONCO

    • Liter: 5.0
    • SubModel: WAGON
    • CUI: 302
    • EngineType: V8

    1967 FORD FAIRLANE

    • Liter: 4.7
    • SubModel: 500XL
    • CUI: 289
    • EngineType: V8

    1985-1991 FORD F-150

    • EngineType: V8
    • SubModel: SUPER CAB

    1993-1994 FORD MUSTANG

    • EngineType: ALL
    • SubModel: COBRA

    1991-1992 MERCURY COUGAR

    • EngineType: ALL
    • SubModel: XR-7

    1969 FORD GALAXIE 500

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

    1971 FORD LTD

    • Liter: 5.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: F
    • CUI: 302
    • EngineType: V8

    1975-1977 FORD GRANADA

    • Liter: 5.0
    • EngineType: V8
    • SubModel: GHIA

    1972-1974 FORD GRAN TORINO

    • Liter: 5.0
    • SubModel: SPORT
    • CUI: 302
    • EngineType: V8

    1977-1979 MERCURY COUGAR

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

    1972 FORD P-350 VAN

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

    1985 FORD LTD

    • EngineType: ALL
    • SubModel: LX BROUGHAM

    1966 FORD RANCHERO

    • EngineType: V8
    • SubModel: CUSTOM

    1965-1967 FORD RANCHERO

    • CC: 4727
    • Liter: 4.7
    • SubModel: BASE
    • CUI: 289
    • EngineType: V8

    1967 FORD RANCHERO

    • Liter: 4.7
    • EngineType: V8
    • SubModel: 500 XL

    1972-1974 FORD GRAN TORINO

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8

    1969 FORD MUSTANG

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

    1969 FORD CUSTOM 500

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

    1977-1979 FORD RANCHERO

    • Liter: 5.0
    • EngineType: V8
    • SubModel: 500

    1964-1967 MERCURY VILLAGER

    • CC: 4727
    • Liter: 4.7
    • SubModel: BASE
    • CUI: 289
    • EngineType: V8

    1982-1985 MERCURY GRAND MARQUIS

    • EngineType: ALL
    • SubModel: COLONY PARK

    1968 FORD BRONCO

    • Liter: 4.7
    • SubModel: ROADSTER
    • CUI: 289
    • EngineType: V8

    1979-1982 FORD E-250 ECONOLINE

    • Liter: 5.0
    • EngineType: V8
    • SubModel: CARGO

    1983 FORD E-150 ECONOLINE CLUB WAGON

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

    1975-1978 FORD MUSTANG II

    • EngineType: V8
    • SubModel: GHIA

    1990 LINCOLN TOWN CAR

    • EngineType: ALL
    • SubModel: SIGNATURE
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