800.345.4545
Unrivaled Customer Service
And Expert Tech Advice!  
FREE SHIPPING!
Same Day Shipping Before 11 PM ET
0
My Cart
0
$0.00
Shop By Vehicle
Shop By
Category
Close Menu
Shop By Vehicle
Top Categories
All Categories

Top Categories

All Categories


Free Catalog
E-Mail Signup
My Account
Track Order
Gift Certificates
Rebates
Help

Ford Performance Crankshaft 302/5.0L

Ford Performance M-6303-C340

397-M-6303-C340

made in usa
jegs shipping
FREE Shipping
Ships directly from the manufacturer
Easy Returns
Easy Returns
Lowest Price Guarantee
Lowest Price Guarantee
Ford Performance Crankshaft 302/5.0L $804.99
Crankshaft
  • 302/5.0L
  • Forged Steel
  • 3.40" Stroke
  • 2.248" Main Journal
  • 2.1232" Rod Journal
  • 1.690" Rod Journal Width
  • Requires Balancing

  • Ford Performance M-6303-C340 Details

    Crankshafts

    Fits 302 production and Ford Racing cylinder blocks. Stock 2.1232" rod journal diameters. Use with M-6200-D50 "Sportsman" rods (5.40" long) and 1.090" CD pistons in standard 302 block for 347 cu. in.

    Features:
  • Lightening holes
  • Rounded CW leading edge, tapered trailing edge
  • Rod and main journals are nitrided and polished
  • Requires custom pistons, rods and balancing

  • Specifications:

    Pin Diameter
    2.1
    Bob Weight
    N/A
    Main Diameter
    OEM
    Rod Length
    OEM
    Stroke
    3.2 - 3.5
    Balancer Bolt Thread Size (in.)
    5/8-18
    Crankshaft Material
    Forged 4340 steel
    Crankshaft Snout Style
    Standard
    Engine Balance (oz.)
    External, 28 imbalance
    Engine Stroke (in.)
    3.4
    Lightened
    No
    Main Bearings Included
    No
    Main Journal Diameter (in.)
    2.248
    Quantity
    Sold individually
    Requires Narrow Bearings
    No
    Rod Bearings Included
    No
    Rod Journal Diameter (in.)
    2.123
    Rear Main Seal Style
    1-piece
    Weight (lbs.)
    60
    Manufacturer's Part Number:
    M-6303-C340

    Crafted from forged steel, these crankshafts are specially designed for the harsh environment of the race track. Available for the Mustang Boss 302, Cobra Jets, and the SVT Lightning, Ford Racing forged crankshafts are the answer to your long term crankshaft performance issues. Ford Racing crankshafts are ready to go into your Boss 302 or 5.4L Ford Racing Engine.

    Features
  • Forged Steel Construction For Superior Durability And Extended Service Life
  • Standard Journal Diameters For Maximum Compatibility
  • Service Replacements For Mustang Boss 302, Cobra Jet 5.4L, And SVT Lightning 5.4L

  • Does Ford Performance M-6303-C340 fit your vehicle?

    Narrow Results

    1970-1974 MERCURY MONTEGO

    • Liter: 5.0
    • SubModel: MX BROUGHAM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1970-1974 MERCURY MONTEGO

    • Liter: 5.0
    • SubModel: VILLAGER
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1987-1991 MERCURY COLONY PARK

    • EngineType: ALL
    • SubModel: GS

    1978-1979 MERCURY ZEPHYR

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1974 FORD E-200 ECONOLINE

    • Liter: 5.0
    • SubModel: CUSTOM WAGON
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1978 FORD MUSTANG II

    • Liter: 5.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: F
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1978 FORD FAIRMONT

    • Liter: 5.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: F
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1987-1991 MERCURY GRAND MARQUIS

    • EngineType: ALL
    • SubModel: GS

    1982 FORD MUSTANG

    • Liter: 5.0
    • SubModel: GLX
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1987-1991 MERCURY COLONY PARK

    • EngineType: ALL
    • SubModel: LS

    1968-1970 FORD FAIRLANE

    • Liter: 5.0
    • SubModel: 500
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975 FORD E-250 ECONOLINE

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1978 FORD MUSTANG II

    • Liter: 5.0
    • SubModel: GHIA
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1980 FORD THUNDERBIRD

    • Liter: 5.0
    • SubModel: SILVER ANNIVERSARY
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1982-1983 FORD F-100

    • Liter: 5.0
    • SubModel: XL
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1995-1996 FORD F-250

    • Liter: 5.0
    • SubModel: EDDIE BAUER
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1984-1986 FORD E-150 ECONOLINE

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1976-1978 FORD F-350

    • Liter: 5.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: G
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1979 FORD FAIRMONT

    • CC: 4949
    • Liter: 5.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: F
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1977 MERCURY COUGAR

    • Liter: 5.0
    • SubModel: BROUGHAM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1984-1985 LINCOLN CONTINENTAL

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1979-1980 FORD E-350 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: CHATEAU
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1977 FORD F-100

    • Liter: 5.0
    • SubModel: XLT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1983-1985 MERCURY GRAND MARQUIS

    • EngineType: ALL
    • SubModel: LS

    1970-1973 FORD MUSTANG

    • Liter: 5.0
    • SubModel: GRANDE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1969-1974 FORD E-200 ECONOLINE

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1985-1992 FORD F-150

    • Liter: 5.0
    • SubModel: XLT LARIAT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1977-1979 MERCURY COUGAR

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1983-1984 FORD E-150 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: XL
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1968-1970 FORD FALCON

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1983 FORD THUNDERBIRD

    • Liter: 5.0
    • SubModel: HERITAGE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1984-1985 LINCOLN CONTINENTAL

    • Liter: 5.0
    • SubModel: VALENTINO
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1979-1982 FORD E-250 ECONOLINE

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1978 FORD MUSTANG II

    • Liter: 5.0
    • SubModel: MACH I
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1984-1986 FORD E-150 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1968-1970 FORD GALAXIE 500

    • Liter: 5.0
    • SubModel: XL
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1987-1991 FORD LTD CROWN VICTORIA

    • EngineType: ALL
    • SubModel: LX

    1983-1988 FORD THUNDERBIRD

    • Liter: 5.0
    • SubModel: SPORT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1979-1982 FORD E-350 ECONOLINE

    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1979 FORD F-150

    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1977-1978 FORD F-250

    • Liter: 5.0
    • SubModel: NORTHLAND
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1984 FORD E-150 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: XLT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1970 FORD E-300 ECONOLINE

    • Liter: 5.0
    • SubModel: CHATEAU WAGON
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1992-1996 FORD E-150 ECONOLINE

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1978 FORD F-350

    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1978-1979 FORD FAIRMONT

    • Liter: 5.0
    • SubModel: FUTURA
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1968-1972 FORD CUSTOM 500

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1968-1974 FORD TORINO

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1984-1985 LINCOLN MARK VII

    • Liter: 5.0
    • SubModel: VERSACE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1968 MERCURY COUGAR

    • Liter: 5.0
    • SubModel: XR-7
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1986-1996 FORD E-150 ECONOLINE

    • Liter: 5.0
    • SubModel: XL
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975 FORD E-250 ECONOLINE

    • Liter: 5.0
    • SubModel: NORTHLAND
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1981-1983 LINCOLN MARK VI

    • EngineType: ALL
    • SubModel: ALL

    1979-1980 FORD E-350 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1982-1983 FORD F-100

    • Liter: 5.0
    • SubModel: XLT LARIAT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1987-1991 MERCURY GRAND MARQUIS

    • EngineType: ALL
    • SubModel: LS

    1982-1983 FORD MUSTANG

    • EngineType: ALL
    • SubModel: GT

    1979 FORD MUSTANG

    • Liter: 5.0
    • SubModel: GHIA
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1971-1972 FORD E-200 ECONOLINE

    • Liter: 5.0
    • SubModel: CHATEAU WAGON
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1991-1992 MERCURY COUGAR

    • EngineType: ALL
    • SubModel: XR-7

    1968-1972 FORD CUSTOM

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1980 FORD F-350

    • Liter: 5.0
    • SubModel: RANGER XLT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1984-1985 FORD THUNDERBIRD

    • Liter: 5.0
    • SubModel: FILA
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1987-1991 FORD F-250

    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1983-1984 FORD F-250

    • Liter: 5.0
    • SubModel: XLT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1983-1986 MERCURY COUGAR

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1978 FORD F-100

    • Liter: 5.0
    • SubModel: NORTHLAND
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1986 FORD E-150 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: XL
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1993-1996 FORD F-150

    • Liter: 5.0
    • SubModel: XLT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1968-1970 FORD FALCON

    • Liter: 5.0
    • SubModel: FUTURA
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1979-1983 FORD E-150 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1968 FORD COUNTRY SEDAN

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1983-1988 FORD THUNDERBIRD

    • Liter: 5.0
    • SubModel: LX
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1984-1985 LINCOLN MARK VII

    • Liter: 5.0
    • SubModel: BILL BLASS
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1984-1986 FORD E-250 ECONOLINE

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1991-1992 MERCURY COUGAR

    • Liter: 5.0
    • SubModel: LS
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1987-1991 FORD COUNTRY SQUIRE

    • EngineType: ALL
    • SubModel: ALL

    1978 FORD THUNDERBIRD

    • Liter: 5.0
    • SubModel: DIAMOND JUBILEE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1981 FORD F-150

    • Liter: 5.0
    • SubModel: RANGER XLT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1979-1982 FORD E-150 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: CHATEAU
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1972-1974 FORD GRAN TORINO

    • Liter: 5.0
    • SubModel: SPORT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1980 FORD GRANADA

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1977-1982 FORD LTD

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1980 FORD GRANADA

    • Liter: 5.0
    • SubModel: GHIA
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1987-1991 FORD LTD CROWN VICTORIA

    • EngineType: ALL
    • SubModel: S

    1978-1981 FORD THUNDERBIRD

    • Liter: 5.0
    • SubModel: TOWN LANDAU
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975 FORD E-350 ECONOLINE

    • Liter: 5.0
    • SubModel: NORTHLAND
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1987-1992 FORD F-150

    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1977 LINCOLN VERSAILLES

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1970-1972 FORD LTD

    • Liter: 5.0
    • SubModel: BROUGHAM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1985-1992 FORD F-250

    • Liter: 5.0
    • SubModel: XLT LARIAT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1982 FORD LTD

    • EngineType: ALL
    • SubModel: COUNTRY SQUIRE

    1979-1980 FORD E-250 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1977-1978 FORD F-250

    • Liter: 5.0
    • SubModel: RANGER XLT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1982-1983 FORD F-150

    • Liter: 5.0
    • SubModel: XLS
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1979-1982 MERCURY MARQUIS

    • Liter: 5.0
    • SubModel: BROUGHAM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1986 FORD E-150 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: XLT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1968 FORD MUSTANG

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1986-1987 LINCOLN CONTINENTAL

    • EngineType: ALL
    • SubModel: ALL

    1969-1974 FORD E-300 ECONOLINE

    • Liter: 5.0
    • SubModel: CLUB WAGON
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )
    Items You Need
    Some parts are not legal for use in California or other states with similar laws / regulations