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Unpublished Item

JEGS Performance Products 25050 - JEGS Main Bearings



JEGS Performance Products 25050 - JEGS Main Bearings

Part Number: 555-25050

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

    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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    1972 FORD MUSTANG

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

    1968-1974 FORD E-200 ECONOLINE

    • EngineType: V8
    • SubModel: CLUB PASSENGER WAGON

    1979-1982 FORD E-250 ECONOLINE

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    • EngineType: V8
    • SubModel: CARGO

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    • EngineType: V8
    • SubModel: BASE

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    • SubModel: CLASS C; E-350

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

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    1973 FORD MUSTANG

    • Liter: 5.0
    • SubModel: GRANDE
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    1983-1984 FORD E-150 ECONOLINE

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

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

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    • Liter: 5.0
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    • SubModel: GRANDE
    • Engine Vin: F
    • CUI: 302
    • EngineType: V8

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

    1980 MERCURY MONARCH

    • Liter: 5.0
    • EngineType: V8
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    1987 FORD BRONCO

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

    1968-1995 FORD MOTORHOME

    • Liter: 5.0
    • EngineType: V8
    • SubModel: CLASS C; E-350

    1964-1967 MERCURY CALIENTE

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

    1971-1972 FORD LTD

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

    1975-1979 FORD F-150

    • Liter: 5.0
    • EngineType: V8
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    1979-1989 MERCURY GRAND MARQUIS

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    • EngineType: V8
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    • Liter: 5.0
    • EngineType: V8
    • SubModel: XR-7

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    • EngineType: ALL
    • SubModel: GTS

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    • EngineType: ALL
    • SubModel: ALL

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

    1969-1974 FORD F-100 PICKUP (CANADIAN)

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    1975-1977 FORD P-500 VAN

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    1974 FORD BRONCO

    • CC: 4950
    • Liter: 5.0
    • SubModel: BASE
    • EngineType: V8

    1979-1980 FORD E-350 ECONOLINE

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

    1972 FORD LTD

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

    1982-1985 MERCURY GRAND MARQUIS

    • EngineType: ALL
    • SubModel: COLONY PARK

    1968 FORD LTD

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

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    • EngineType: V8
    • SubModel: CHATEAU PASSENGER WAGON

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

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    • SubModel: BASE

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

    1980 LINCOLN MARK VI

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

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

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

    1969-1971 FORD BRONCO

    • EngineType: V8
    • SubModel: WAGON

    1984 MERCURY CAPRI

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

    1968 FORD RANCH WAGON

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

    1992-1996 FORD F-150 PICKUP

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

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    • EngineType: ALL
    • SubModel: COBRA SVT

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    • Liter: 5.0
    • Aspiration: N
    • SubModel: GT
    • Engine Vin: T
    • CUI: 302
    • EngineType: V8

    1968 MERCURY COUGAR

    • Liter: 5.0
    • SubModel: XR-7
    • CUI: 302
    • EngineType: V8

    1983-1986 MERCURY CAPRI

    • EngineType: V8
    • SubModel: BASE

    1996 FORD BRONCO

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

    1970-1972 FORD COUNTRY SQUIRE

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

    1970 FORD MUSTANG

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

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    • EngineType: ALL
    • SubModel: GT

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

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

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    • SubModel: Z7

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    • EngineType: V8
    • SubModel: FUTURA

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

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    • EngineType: V8
    • SubModel: BASE

    1969 FORD BRONCO

    • EngineType: V8
    • SubModel: ROADSTER

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

    1987-1988 MERCURY COUGAR

    • EngineType: V8
    • SubModel: LS

    1964-1965 FORD COUNTRY SQUIRE

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

    1998-2001 FORD MOTORHOME

    • EngineType: ALL
    • SubModel: CLASS C; E-450

    1982-1983 LINCOLN MARK VI

    • EngineType: ALL
    • SubModel: BASE

    1977-1979 FORD LTD

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

    1986-1989 FORD E-150 ECONOLINE

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

    1971-1972 FORD E-300 ECONOLINE

    • EngineType: V8
    • SubModel: CUSTOM PASSENGER WAGON

    1971-1972 FORD COUNTRY SEDAN

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

    1968-1974 FORD E-200 ECONOLINE

    • EngineType: V8
    • SubModel: CARGO

    1975-1978 FORD MUSTANG II

    • EngineType: V8
    • SubModel: MACH 1

    1980-1982 FORD BRONCO

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

    1968 FORD BRONCO

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

    1975-1977 MERCURY MONARCH

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

    1970-1971 FORD TORINO

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

    1991-1992 MERCURY COUGAR

    • EngineType: ALL
    • SubModel: XR-7

    1970-1972 FORD RANCH WAGON

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

    1969 FORD FAIRLANE

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

    1975-1978 FORD MUSTANG II

    • EngineType: V8
    • SubModel: GHIA

    1984 FORD E-250 ECONOLINE

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

    1977-1982 FORD LTD

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

    1968 FORD BRONCO

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

    1990-1991 FORD E-250 ECONOLINE

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

    1969 FORD LTD

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

    1972 FORD BRONCO

    • CC: 4950
    • Liter: 5.0
    • SubModel: BASE
    • EngineType: V8

    1966-1967 FORD LTD

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

    1980 LINCOLN CONTINENTAL

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

    1977-1979 FORD LTD II

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

    1990-1991 MERCURY GRAND MARQUIS

    • EngineType: ALL
    • SubModel: BASE

    1964-1967 FORD MUSTANG

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

    1979 FORD E-150 ECONOLINE

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

    1968 FORD FALCON

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

    1977 FORD LTD II

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

    1970 MERCURY COUGAR

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

    1983-1984 FORD E-250 ECONOLINE

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