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NGK Spark Plugs XR4IX

Iridium IX Spark Plug 14mm x 3/8" Reach

NGK Spark Plugs XR4IX

739-XR4IX

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Estimated ship date 11/24/17 if Ordered Today
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NGK Spark Plugs XR4IX Iridium IX Spark Plug 14mm x 3/8" Reach $7.99
Iridium IX Spark Plug
  • 14mm x 3/8" Reach
  • 13/16" Hex
  • Projected
  • Gasket seat
  • Sold Individually

  • Specifications:

    Manufacturer's Part Number:
    XR4IX

    The Plug for Serious Enthusiasts
    Iridium has a very high melting point that's perfect for high-performance, high-tech engines. It is stronger than any other metal used in spark plugs.

  • Ultra-fine electrode (thin enough for spark consistency & accuracy, thick enough for max durability & longevity)
  • Reduces spark voltage requirement
  • Fuel efficiency & extreme ignitability
  • Improved throttle response
  • Outstanding acceleration
  • Superior antifouling, anticorrosion, and antiseizing properties
  • Quality NGK Spark Plugs
  • Sold individually

  • Does NGK Spark Plugs XR4IX fit your vehicle?

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    Aspiration

    1970 OLDSMOBILE DELTA 88

    • CC: 7456
    • Liter: 7.5
    • SubModel: ROYALE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1964 DODGE 330

    • CC: 6286
    • Liter: 6.3
    • SubModel: BASE
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1963 CHRYSLER TOWN & COUNTRY

    • CC: 6981
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 426
    • EngineType: V8 ( 7.0 L / 426 )

    1967 DODGE MONACO

    • EngineType: ALL
    • SubModel: 500

    1962 CHRYSLER NEWPORT

    • CC: 6769
    • Liter: 6.7
    • SubModel: BASE
    • CUI: 413
    • EngineType: V8 ( 6.7 L / 413 )

    1966-1967 CHEVROLET IMPALA

    • Liter: 4.6
    • SubModel: SS
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1963-1964 DODGE 330

    • CC: 6981
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 426
    • EngineType: V8 ( 7.0 L / 426 )

    1970 PONTIAC LEMANS

    • CC: 7456
    • Liter: 7.5
    • SubModel: SAFARI
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1968-1971 OLDSMOBILE DELTA 88

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1967 DODGE CORONET

    • CC: 6286
    • Liter: 6.3
    • SubModel: R/T
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1956-1957 PLYMOUTH PLAZA

    • Liter: 4.5
    • SubModel: BASE
    • CUI: 273
    • EngineType: V8 ( 4.5 L / 273 )

    1972-1974 OLDSMOBILE CUTLASS SUPREME

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1957-1958 BUICK SPECIAL

    • CC: 5967
    • Liter: 6.0
    • SubModel: BASE
    • CUI: 364
    • EngineType: V8 ( 6.0 L / 364 )

    1971 PONTIAC CATALINA

    • CC: 7456
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1970-1971 PONTIAC LEMANS

    • CC: 5733
    • Liter: 5.7
    • SubModel: SPORT
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1956-1957 PLYMOUTH SUBURBAN

    • Liter: 4.5
    • SubModel: SPORT
    • CUI: 273
    • EngineType: V8 ( 4.5 L / 273 )

    1966 DODGE CORONET

    • Liter: 5.2
    • SubModel: DELUXE
    • CUI: 318
    • EngineType: V8 ( 5.2 L / 318 )

    1970 DODGE CORONET

    • CC: 6286
    • Liter: 6.3
    • SubModel: BASE
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1968 DODGE CORONET

    • CC: 6286
    • Liter: 6.3
    • SubModel: R/T
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1966-1971 JEEP CJ6

    • CC: 3687
    • Liter: 3.7
    • SubModel: BASE
    • CUI: 225
    • EngineType: V6 ( 3.7 L / 225 )

    1958 PLYMOUTH FURY

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1961-1966 PLYMOUTH FURY

    • CC: 6286
    • Liter: 6.3
    • SubModel: BASE
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1972-1974 DODGE CORONET

    • CC: 6556
    • Liter: 6.6
    • SubModel: CRESTWOOD
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1974 DODGE B200 VAN

    • CC: 6555
    • Liter: 6.6
    • SubModel: SPORTSMAN
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1956 DODGE CUSTOM

    • CC: 5163
    • Liter: 5.1
    • SubModel: BASE
    • CUI: 315
    • EngineType: V8 ( 5.1 L / 315 )

    1975-1978 CHRYSLER NEWPORT

    • CC: 6555
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1963-1967 PONTIAC LEMANS

    • CC: 5343
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 326
    • EngineType: V8 ( 5.3 L / 326 )

    1967-1968 DODGE POLARA

    • CC: 6286
    • Liter: 6.3
    • SubModel: BASE
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1964-1965 DODGE 880

    • CC: 6286
    • Liter: 6.3
    • SubModel: CUSTOM
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1960 PONTIAC VENTURA

    • EngineType: ALL
    • SubModel: ALL

    1970-1971 PONTIAC GTO

    • EngineType: ALL
    • SubModel: THE JUDGE

    1950-1953 CHEVROLET BEL AIR

    • Liter: 3.9
    • SubModel: BASE
    • CUI: 236
    • EngineType: L6 ( 3.9 L / 236 )

    1972 OLDSMOBILE F85

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1961 PONTIAC TEMPEST

    • CC: 6376
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1960-1965 PLYMOUTH BELVEDERE

    • CC: 5917
    • Liter: 5.9
    • SubModel: BASE
    • CUI: 361
    • EngineType: V8 ( 5.9 L / 361 )

    1951-1958 BUICK SUPER

    • EngineType: ALL
    • SubModel: ALL

    1957-1961 CHRYSLER WINDSOR

    • EngineType: ALL
    • SubModel: ALL

    1969-1971 OLDSMOBILE CUTLASS

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1971 OLDSMOBILE DELTA 88

    • EngineType: ALL
    • SubModel: CUSTOM

    1972-1973 DODGE POLARA

    • CC: 7212
    • Liter: 7.2
    • SubModel: CUSTOM
    • CUI: 440
    • EngineType: V8 ( 7.2 L / 440 )

    1971 OLDSMOBILE DELTA 88

    • EngineType: ALL
    • SubModel: ROYALE

    1967 CHEVROLET CHEVELLE

    • Liter: 5.4
    • SubModel: DELUXE
    • CUI: 327
    • EngineType: V8 ( 5.4 L / 327 )

    1962-1967 CHEVROLET BEL AIR

    • CC: 5358
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.3 L / 327 )

    1968-1970 OLDSMOBILE DELTA 88

    • CC: 7456
    • Liter: 7.5
    • SubModel: CUSTOM
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1970 DODGE POLARA

    • CC: 7212
    • Liter: 7.2
    • SubModel: SPECIAL
    • CUI: 440
    • EngineType: V8 ( 7.2 L / 440 )

    1965-1967 DODGE CORONET

    • Liter: 5.2
    • SubModel: 440
    • CUI: 318
    • EngineType: V8 ( 5.2 L / 318 )

    1960-1961 PLYMOUTH CUSTOM

    • CC: 5917
    • Liter: 5.9
    • SubModel: BASE
    • CUI: 361
    • EngineType: V8 ( 5.9 L / 361 )

    1956 PLYMOUTH SAVOY

    • CC: 4425
    • Liter: 4.4
    • SubModel: BASE
    • CUI: 270
    • EngineType: V8 ( 4.4 L / 270 )

    1970 PONTIAC EXECUTIVE

    • CC: 7456
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1971 DODGE POLARA

    • CC: 6286
    • Liter: 6.3
    • SubModel: BASE
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1970 PONTIAC BONNEVILLE

    • CC: 7456
    • Liter: 7.5
    • SubModel: SAFARI
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1971-1974 OLDSMOBILE CUTLASS

    • CC: 5737
    • Liter: 5.7
    • SubModel: S
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1968 DODGE MONACO

    • CC: 6286
    • Liter: 6.3
    • SubModel: 500
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1965-1966 DODGE MONACO

    • CC: 6286
    • Liter: 6.3
    • SubModel: BASE
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1967-1968 DODGE CHARGER

    • CC: 6286
    • Liter: 6.3
    • SubModel: BASE
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1971 PONTIAC GRANDVILLE

    • CC: 7456
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1955-1956 DODGE CORONET

    • CC: 4425
    • Liter: 4.4
    • SubModel: BASE
    • CUI: 270
    • EngineType: V8 ( 4.4 L / 270 )

    1972-1974 OLDSMOBILE CUSTOM CRUISER

    • CC: 7457
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1956 PLYMOUTH SUBURBAN

    • Liter: 4.4
    • SubModel: DELUXE
    • CUI: 270
    • EngineType: V8 ( 4.4 L / 270 )

    1968-1969 CHEVROLET CAMARO

    • Liter: 5.4
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.4 L / 327 )

    1970-1971 PONTIAC BONNEVILLE

    • CC: 6555
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975-1976 DODGE MONACO

    • Liter: 6.6
    • SubModel: ROYAL
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1959-1967 CHEVROLET IMPALA

    • CC: 4638
    • Liter: 4.6
    • SubModel: BASE
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1970 PONTIAC LEMANS

    • CC: 7456
    • Liter: 7.5
    • SubModel: SPORT
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1971 DODGE CHARGER

    • CC: 6286
    • Liter: 6.3
    • SubModel: SPECIAL EDITION
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1970-1971 CHRYSLER NEWPORT

    • CC: 7212
    • Liter: 7.2
    • SubModel: CUSTOM
    • CUI: 440
    • EngineType: V8 ( 7.2 L / 440 )

    1972-1973 DODGE POLARA

    • CC: 6556
    • Liter: 6.6
    • SubModel: CUSTOM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975 OLDSMOBILE CUSTOM CRUISER

    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1970-1971 PONTIAC GTO

    • CC: 7456
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1964 CHEVROLET CHEVELLE

    • CC: 5358
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.3 L / 327 )

    1968 CHEVROLET CHEVELLE

    • CC: 5031
    • Liter: 5.0
    • SubModel: CONCOURS
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1957-1958 DODGE CUSTOM

    • CC: 5327
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 325
    • EngineType: V8 ( 5.3 L / 325 )

    1967-1968 PONTIAC GRAND PRIX

    • CC: 7014
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1970 PONTIAC TEMPEST

    • CC: 5733
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1968 CHEVROLET CHEVELLE

    • Liter: 5.4
    • SubModel: 300 DELUXE
    • CUI: 327
    • EngineType: V8 ( 5.4 L / 327 )

    1972-1974 DODGE CORONET

    • CC: 6556
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1957-1958 CHRYSLER TOWN & COUNTRY

    • CC: 5802
    • Liter: 5.8
    • SubModel: BASE
    • CUI: 354
    • EngineType: V8 ( 5.8 L / 354 )

    1958 BUICK LIMITED

    • EngineType: ALL
    • SubModel: ALL

    1972-1974 CHRYSLER NEWPORT

    • CC: 6556
    • Liter: 6.6
    • SubModel: CUSTOM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1967-1971 DODGE D300 PICKUP

    • CC: 6286
    • Liter: 6.3
    • SubModel: BASE
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1968 OLDSMOBILE DELMONT 88

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1965 BUICK WILDCAT

    • CC: 6572
    • Liter: 6.6
    • SubModel: DELUXE
    • CUI: 401
    • EngineType: V8 ( 6.6 L / 401 )

    1953-1958 BUICK ROADMASTER

    • EngineType: ALL
    • SubModel: ALL

    1968-1971 DODGE D200 PICKUP

    • CC: 6286
    • Liter: 6.3
    • SubModel: BASE
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1972-1974 OLDSMOBILE CUTLASS

    • CC: 7456
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1971 DODGE W100 PICKUP

    • CC: 6556
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1966-1967 BUICK SPORTWAGON

    • CC: 5573
    • Liter: 5.6
    • SubModel: BASE
    • CUI: 340
    • EngineType: V8 ( 5.6 L / 340 )

    1969 PONTIAC FIREBIRD

    • EngineType: ALL
    • SubModel: 350 HO

    1968-1969 CHRYSLER 300

    • EngineType: ALL
    • SubModel: ALL

    1971 DODGE CORONET

    • CC: 6286
    • Liter: 6.3
    • SubModel: CUSTOM
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1971 DODGE POLARA

    • CC: 6286
    • Liter: 6.3
    • SubModel: CUSTOM
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1955 PLYMOUTH SUBURBAN

    • CC: 4261
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 260
    • EngineType: V8 ( 4.3 L / 260 )

    1958 DODGE CUSTOM

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1957 PLYMOUTH PLAZA

    • CC: 4933
    • Liter: 4.9
    • SubModel: BASE
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1959 PLYMOUTH BELVEDERE

    • CC: 5917
    • Liter: 5.9
    • SubModel: BASE
    • CUI: 361
    • EngineType: V8 ( 5.9 L / 361 )

    1962-1966 PONTIAC GRAND PRIX

    • CC: 6376
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1969 OLDSMOBILE DELTA 88

    • CC: 5737
    • Liter: 5.7
    • SubModel: CUSTOM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1968-1969 CHRYSLER TOWN & COUNTRY

    • EngineType: ALL
    • SubModel: ALL

    1957 PLYMOUTH FURY

    • Liter: 4.9
    • SubModel: BASE
    • CUI: 299
    • EngineType: V8 ( 4.9 L / 299 )

    1967 DODGE W300 SERIES

    • CC: 6286
    • Liter: 6.3
    • SubModel: BASE
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )
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