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NGK Spark Plugs GR4IX

Iridium IX Spark Plug 14mm x 3/4" Reach

NGK Spark Plugs GR4IX

739-GR4IX

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$5.99
$5.32
ON SALE - $0.67 OFF
NGK Spark Plugs GR4IX Iridium IX Spark Plug 14mm x 3/4" Reach $5.32
Iridium IX Spark Plug
  • 14mm x 3/4" Reach
  • 13/16" Hex
  • Projected
  • Gasket seat
  • Sold Individually

  • Specifications:

    Manufacturer's Part Number:
    GR4IX

    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 GR4IX fit your vehicle?

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    Aspiration

    1970 DODGE POLARA

    • CC: 3687
    • Liter: 3.7
    • SubModel: SPECIAL
    • CUI: 225
    • EngineType: L6 ( 3.7 L / 225 )

    1971 DODGE DART

    • CC: 5212
    • Liter: 5.2
    • SubModel: SWINGER
    • CUI: 318
    • EngineType: V8 ( 5.2 L / 318 )

    1971-1973 PLYMOUTH CUDA

    • CC: 5572
    • Liter: 5.6
    • SubModel: BASE
    • CUI: 340
    • EngineType: V8 ( 5.6 L / 340 )

    1968 CHEVROLET CHEVELLE

    • CC: 4098
    • Liter: 4.1
    • SubModel: CONCOURS
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1968-1969 CHEVROLET G10 VAN

    • CC: 4097
    • Liter: 4.1
    • SubModel: SPORTVAN
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1970-1971 PLYMOUTH BARRACUDA

    • CC: 3687
    • Liter: 3.7
    • SubModel: GRAN COUPE
    • CUI: 225
    • EngineType: L6 ( 3.7 L / 225 )

    1969 DODGE DART

    • CC: 2786
    • Liter: 2.8
    • SubModel: GT
    • CUI: 170
    • EngineType: L6 ( 2.8 L / 170 )

    1967 CHEVROLET CHEVELLE

    • CC: 4097
    • Liter: 4.1
    • SubModel: DELUXE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1976-1980 PLYMOUTH VOLARE

    • Liter: 5.9
    • SubModel: BASE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1981-1984 PLYMOUTH RELIANT

    • Liter: 2.2
    • SubModel: CUSTOM
    • CUI: 135
    • EngineType: L4 ( 2.2 L / 135 )

    1969 CHEVROLET C20 PICKUP

    • CC: 4097
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1968 AMERICAN MOTORS AMERICAN

    • CC: 4753
    • Liter: 4.7
    • SubModel: 440
    • CUI: 290
    • EngineType: V8 ( 4.7 L / 290 )

    1968-1969 CHEVROLET CHEVELLE

    • CC: 4098
    • Liter: 4.1
    • SubModel: 300 DELUXE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1968 GMC K25/K2500 PICKUP

    • CC: 4097
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1968 PLYMOUTH VALIANT

    • CC: 3687
    • Liter: 3.7
    • SubModel: 100
    • CUI: 225
    • EngineType: L6 ( 3.7 L / 225 )

    1969-1974 DODGE CHARGER

    • CC: 5212
    • Liter: 5.2
    • SubModel: BASE
    • CUI: 318
    • EngineType: V8 ( 5.2 L / 318 )

    1963-1968 PLYMOUTH BELVEDERE

    • CC: 3687
    • Liter: 3.7
    • SubModel: BASE
    • CUI: 225
    • EngineType: L6 ( 3.7 L / 225 )

    1988 DODGE LANCER

    • EngineType: ALL
    • SubModel: BASE

    1970-1972 DODGE CHALLENGER

    • CC: 3687
    • Liter: 3.7
    • SubModel: BASE
    • CUI: 225
    • EngineType: L6 ( 3.7 L / 225 )

    1968-1970 JEEP J-3700

    • CC: 3802
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 232
    • EngineType: L6 ( 3.8 L / 232 )

    1957 DODGE CORONET

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

    1981 PLYMOUTH TRAILDUSTER

    • EngineType: ALL
    • SubModel: ALL

    1968-1969 AMERICAN MOTORS AMBASSADOR

    • Liter: 4.8
    • SubModel: BASE
    • CUI: 290
    • EngineType: V8 ( 4.8 L / 290 )

    1975-1977 AMERICAN MOTORS PACER

    • EngineType: ALL
    • SubModel: ALL

    1964-1967 CHEVROLET EL CAMINO

    • Liter: 3.8
    • SubModel: BASE
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1966 PLYMOUTH VALIANT

    • CC: 2786
    • Liter: 2.8
    • SubModel: BASE
    • CUI: 170
    • EngineType: L6 ( 2.8 L / 170 )

    1968 CHEVROLET C20 PICKUP

    • CC: 4097
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1971 CHRYSLER NEWPORT

    • Liter: 5.9
    • SubModel: BASE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1978 DODGE DIPLOMAT

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

    1962-1967 CHEVROLET CHEVY II

    • CC: 2507
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 153
    • EngineType: L4 ( 2.5 L / 153 )

    1971 DODGE B200 VAN

    • CC: 5212
    • Liter: 5.2
    • SubModel: BASE
    • CUI: 318
    • EngineType: V8 ( 5.2 L / 318 )

    1970 DODGE POLARA

    • CC: 3687
    • Liter: 3.7
    • SubModel: BASE
    • CUI: 225
    • EngineType: L6 ( 3.7 L / 225 )

    1981-1982 CHRYSLER CORDOBA

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

    1976 PLYMOUTH DUSTER

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

    1960-1961 DODGE DART

    • CC: 3687
    • Liter: 3.7
    • SubModel: PHOENIX
    • CUI: 225
    • EngineType: L6 ( 3.7 L / 225 )

    1974 PLYMOUTH VALIANT

    • CC: 3687
    • Liter: 3.7
    • SubModel: BROUGHAM
    • CUI: 225
    • EngineType: L6 ( 3.7 L / 225 )

    1989 DODGE GRAND CARAVAN

    • CC: 2507
    • Liter: 2.5
    • SubModel: LE
    • CUI: 153
    • EngineType: L4 ( 2.5 L / 153 )

    1968 GMC K25/K2500 SUBURBAN

    • CC: 4097
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1965-1966 DODGE P200 VAN

    • CC: 2786
    • Liter: 2.8
    • SubModel: BASE
    • CUI: 170
    • EngineType: L6 ( 2.8 L / 170 )

    1966-1967 AMERICAN MOTORS AMBASSADOR

    • EngineType: ALL
    • SubModel: DPL

    1967 CHEVROLET CHEVELLE

    • CC: 4097
    • Liter: 4.1
    • SubModel: 300
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1974 PLYMOUTH FURY

    • Liter: 5.9
    • SubModel: POLICE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1982 DODGE D350 PICKUP

    • Liter: 5.9
    • SubModel: RS
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1980-1981 JEEP CJ7

    • Liter: 5.0
    • SubModel: LAREDO
    • CUI: 304
    • EngineType: V8 ( 5.0 L / 304 )

    1985 CHRYSLER LEBARON

    • EngineType: ALL
    • SubModel: TURBO

    1985 PLYMOUTH RELIANT

    • Liter: 2.2
    • SubModel: LE
    • CUI: 135
    • EngineType: L4 ( 2.2 L / 135 )

    1975-1987 ROLLS-ROYCE CAMARGUE

    • EngineType: ALL
    • SubModel: ALL

    1970-1974 CADILLAC FLEETWOOD

    • CC: 7735
    • Liter: 7.7
    • SubModel: 60 SPECIAL
    • CUI: 472
    • EngineType: V8 ( 7.7 L / 472 )

    1967 PONTIAC TEMPEST

    • EngineType: ALL
    • SubModel: CUSTOM

    1977-1980 BENTLEY T2 SERIES

    • EngineType: ALL
    • SubModel: ALL

    1969-1973 PLYMOUTH FURY I

    • CC: 5212
    • Liter: 5.2
    • SubModel: BASE
    • CUI: 318
    • EngineType: V8 ( 5.2 L / 318 )

    1975-1977 JEEP J10

    • Liter: 4.2
    • SubModel: BASE
    • CUI: 258
    • EngineType: L6 ( 4.2 L / 258 )

    1984-1985 PLYMOUTH HORIZON

    • EngineType: ALL
    • SubModel: SE

    1955 CHRYSLER NASSAU

    • EngineType: ALL
    • SubModel: ALL

    1989-1993 DODGE SPIRIT

    • CC: 2507
    • Liter: 2.5
    • SubModel: ES
    • CUI: 153
    • EngineType: L4 ( 2.5 L / 153 )

    1968 PLYMOUTH VALIANT

    • CC: 2786
    • Liter: 2.8
    • SubModel: 100
    • CUI: 170
    • EngineType: L6 ( 2.8 L / 170 )

    1972 AMERICAN MOTORS JAVELIN

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

    1970 PLYMOUTH FURY

    • CC: 3687
    • Liter: 3.7
    • SubModel: CUSTOM SUBURBAN
    • CUI: 225
    • EngineType: L6 ( 3.7 L / 225 )

    1973 DODGE D100 PICKUP

    • CC: 3254
    • Liter: 3.2
    • SubModel: BASE
    • CUI: 198
    • EngineType: L6 ( 3.2 L / 198 )

    1993-1994 PLYMOUTH SUNDANCE

    • EngineType: ALL
    • SubModel: BASE

    1972-1973 DODGE DART

    • CC: 3254
    • Liter: 3.2
    • SubModel: SWINGER
    • CUI: 198
    • EngineType: L6 ( 3.2 L / 198 )

    1980 DODGE MIRADA

    • Liter: 5.9
    • SubModel: SPECIAL COUPE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1969-1971 INTERNATIONAL M1200

    • Liter: 3.8
    • SubModel: BASE
    • CUI: 232
    • EngineType: L6 ( 3.8 L / 232 )

    1971 PLYMOUTH FURY

    • Liter: 5.9
    • SubModel: CUSTOM
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1976 MERCURY BOBCAT

    • Liter: 2.8
    • SubModel: S RUNABOUT
    • CUI: 171
    • EngineType: V6 ( 2.8 L / 171 )

    1983 DODGE DIPLOMAT

    • CC: 5211
    • Liter: 5.2
    • SubModel: MEDALLION
    • CUI: 318
    • EngineType: V8 ( 5.2 L / 318 )

    1981-1987 DODGE B150 VAN

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

    1989-1991 DODGE W250 PICKUP

    • CC: 5211
    • Liter: 5.2
    • SubModel: BASE
    • CUI: 318
    • EngineType: V8 ( 5.2 L / 318 )

    1968 PLYMOUTH FURY

    • CC: 5212
    • Liter: 5.2
    • SubModel: SPORT
    • CUI: 318
    • EngineType: V8 ( 5.2 L / 318 )

    1972-1973 DODGE CORONET

    • CC: 5572
    • Liter: 5.6
    • SubModel: CUSTOM
    • CUI: 340
    • EngineType: V8 ( 5.6 L / 340 )

    1978-1979 AMERICAN MOTORS AMX

    • CC: 4982
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 304
    • EngineType: V8 ( 5.0 L / 304 )

    1969 PLYMOUTH SATELLITE

    • CC: 5212
    • Liter: 5.2
    • SubModel: BASE
    • CUI: 318
    • EngineType: V8 ( 5.2 L / 318 )

    1969-1972 PLYMOUTH FURY I

    • CC: 3687
    • Liter: 3.7
    • SubModel: BASE
    • CUI: 225
    • EngineType: L6 ( 3.7 L / 225 )

    1972 JEEP COMMANDO

    • CC: 3802
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 232
    • EngineType: L6 ( 3.8 L / 232 )

    1968-1969 CHEVROLET CHEVELLE

    • CC: 3769
    • Liter: 3.8
    • SubModel: CONCOURS
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1966 CHEVROLET C10 PICKUP

    • CC: 4098
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1974 PLYMOUTH PB200 VAN

    • Liter: 5.2
    • SubModel: VOYAGER EX WAGON
    • CUI: 318
    • EngineType: V8 ( 5.2 L / 318 )

    1983 DODGE B350 VAN

    • EngineType: ALL
    • SubModel: ALL

    1984-1986 CHRYSLER LASER

    • EngineType: ALL
    • SubModel: ALL

    1969 DODGE DART

    • CC: 2786
    • Liter: 2.8
    • SubModel: SWINGER
    • CUI: 170
    • EngineType: L6 ( 2.8 L / 170 )

    1970-1972 DODGE CHARGER

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

    1972 JEEP COMMANDO

    • CC: 3802
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 232
    • EngineType: L6 ( 3.8 L / 232 )

    1968-1969 AMERICAN MOTORS JAVELIN

    • CC: 4753
    • Liter: 4.7
    • SubModel: BASE
    • CUI: 290
    • EngineType: V8 ( 4.7 L / 290 )

    1972-1974 DODGE B300 VAN

    • CC: 3687
    • Liter: 3.7
    • SubModel: MAXI WAGON
    • CUI: 225
    • EngineType: L6 ( 3.7 L / 225 )

    1970 DODGE CORONET

    • CC: 5212
    • Liter: 5.2
    • SubModel: BASE
    • CUI: 318
    • EngineType: V8 ( 5.2 L / 318 )

    1977-1980 DODGE D200 PICKUP

    • CC: 5211
    • Liter: 5.2
    • SubModel: BASE
    • CUI: 318
    • EngineType: V8 ( 5.2 L / 318 )

    1968 PONTIAC TEMPEST

    • CC: 4098
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1975-1976 DODGE D300 PICKUP

    • Liter: 5.9
    • SubModel: CUSTOM
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1971-1973 DODGE B200 VAN

    • CC: 3687
    • Liter: 3.7
    • SubModel: SPORTSMAN
    • CUI: 225
    • EngineType: L6 ( 3.7 L / 225 )

    1964-1966 AMERICAN MOTORS CLASSIC

    • CC: 3802
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 232
    • EngineType: L6 ( 3.8 L / 232 )

    1976-1978 PLYMOUTH FURY

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

    1988 CHRYSLER NEW YORKER

    • EngineType: ALL
    • SubModel: TURBO

    1978-1980 JEEP CJ5

    • Liter: 5.0
    • SubModel: GOLDEN EAGLE
    • CUI: 304
    • EngineType: V8 ( 5.0 L / 304 )

    1970 DODGE CHALLENGER

    • EngineType: ALL
    • SubModel: T/A

    1978-1981 DODGE DIPLOMAT

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

    1984-1987 DODGE D250 PICKUP

    • Liter: 5.9
    • SubModel: BASE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1967 GMC P15/P1500 VAN

    • Liter: 3.8
    • SubModel: BASE
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1966 CHEVROLET SUBURBAN

    • CC: 4098
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1968 DODGE CHARGER

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

    1967 AMERICAN MOTORS MARLIN

    • EngineType: ALL
    • SubModel: ALL

    what is the heat range for these plugs, I would like to use the in an engine with 11.5 to 1 compression. It has a MSD 6AL Ignition, and operates at relatively 200 degrees.

    Asked by: Lightening
    These plugs have a very wide heat range and should work well in your application.
    Answered by: Rusty B
    Date published: 2017-11-14
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