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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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    1984-1987 DODGE W100 PICKUP

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

    1983-1987 DODGE D350 PICKUP

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

    1968 PLYMOUTH VALIANT

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

    1971 AMERICAN MOTORS HORNET

    • EngineType: ALL
    • SubModel: BASE

    1986 OLDSMOBILE FIRENZA

    • Liter: 1.8
    • SubModel: LC
    • CUI: 112
    • EngineType: L4 ( 1.8 L / 112 )

    1971 DODGE D300 PICKUP

    • CC: 5899
    • Liter: 5.9
    • SubModel: BASE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1969 DODGE CHARGER

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

    1972-1974 DODGE DART

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

    1966 OLDSMOBILE F85

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

    1975-1976 DODGE CORONET

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

    1974 DODGE DART

    • EngineType: ALL
    • SubModel: SPECIAL

    1966 AMERICAN MOTORS MARLIN

    • CC: 3261
    • Liter: 3.3
    • SubModel: BASE
    • CUI: 199
    • EngineType: L6 ( 3.3 L / 199 )

    1975-1980 DODGE RAMCHARGER

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

    1977-1980 DODGE D200 PICKUP

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

    1974 DODGE B100 VAN

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

    1983-1984 OLDSMOBILE FIRENZA

    • Liter: 1.8
    • SubModel: S
    • CUI: 112
    • EngineType: L4 ( 1.8 L / 112 )

    1973 DODGE DART

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

    1972-1973 DODGE DART

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

    1970-1973 PLYMOUTH FURY

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

    1975-1979 DODGE CB300 VAN

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

    1968 DODGE DART

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

    1974-1980 PLYMOUTH TRAILDUSTER

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

    1971 INTERNATIONAL M1100

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

    1969 AMERICAN MOTORS RAMBLER

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

    1968-1969 CHEVROLET G10 VAN

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

    1969 GMC C25/C2500 SUBURBAN

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

    1990-1992 DODGE SPIRIT

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

    1963-1965 CHEVROLET IMPALA

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

    1982-1983 JEEP WAGONEER

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

    1975-1976 DODGE DART

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

    1969 DODGE DART

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

    1968-1969 AMERICAN MOTORS JAVELIN

    • CC: 6391
    • Liter: 6.4
    • SubModel: SST
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1984-1987 DODGE D100 PICKUP

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

    1969 AMERICAN MOTORS RAMBLER

    • CC: 3802
    • Liter: 3.8
    • SubModel: 440
    • CUI: 232
    • EngineType: L6 ( 3.8 L / 232 )

    1969-1970 DODGE DART

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

    1968 PLYMOUTH VALIANT

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

    1970-1972 PLYMOUTH FURY

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

    1974 JEEP CHEROKEE (SJ)

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

    1990 DODGE D150 PICKUP

    • EngineType: ALL
    • SubModel: S

    1970-1971 DODGE POLARA

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

    1989 PONTIAC LEMANS

    • Liter: 2.0
    • SubModel: LE
    • CUI: 122
    • EngineType: L4 ( 2.0 L / 122 )

    1959-1960 CHEVROLET EL CAMINO

    • CC: 5704
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 348
    • EngineType: V8 ( 5.7 L / 348 )

    1974 DODGE DART

    • EngineType: ALL
    • SubModel: CUSTOM

    1969 PLYMOUTH VALIANT

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

    1961-1967 DODGE W200 PICKUP

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

    1971-1973 DODGE B200 VAN

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

    1988-1993 DODGE CARAVAN

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

    1970-1971 PLYMOUTH DUSTER

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

    1982 PLYMOUTH HORIZON

    • EngineType: ALL
    • SubModel: E-TYPE

    1971 DODGE CORONET

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

    1975-1979 DODGE CB300 VAN

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

    1972-1974 PLYMOUTH SCAMP

    • EngineType: ALL
    • SubModel: ALL

    1992-1993 DODGE DAYTONA

    • EngineType: ALL
    • SubModel: IROC R/T

    1969-1970 DODGE CORONET

    • CC: 3687
    • Liter: 3.7
    • SubModel: 440
    • CUI: 225
    • EngineType: L6 ( 3.7 L / 225 )

    1970 CADILLAC FLEETWOOD

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

    1971 DODGE B100 VAN

    • EngineType: ALL
    • SubModel: ALL

    1966 GMC SUBURBAN

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

    1977 DODGE ROYAL MONACO

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

    1983 PLYMOUTH SCAMP

    • EngineType: ALL
    • SubModel: ALL

    1970 DODGE POLARA

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

    1968-1969 AMERICAN MOTORS AMX

    • CC: 5585
    • Liter: 5.6
    • SubModel: BASE
    • CUI: 343
    • EngineType: V8 ( 5.6 L / 343 )

    1971-1974 DODGE CHARGER

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

    1975 PLYMOUTH SCAMP

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

    1976 PLYMOUTH VALIANT

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

    1967-1968 PLYMOUTH SATELLITE

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

    1973 PLYMOUTH FURY I

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

    1962-1967 CHEVROLET CHEVY II

    • CC: 3180
    • Liter: 3.2
    • SubModel: NOVA
    • CUI: 194
    • EngineType: L6 ( 3.2 L / 194 )

    1964-1966 CHEVROLET CHEVY II

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

    1988-1991 PLYMOUTH VOYAGER

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

    1972-1980 DODGE B200 VAN

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

    1988 DODGE DYNASTY

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

    1975-1976 DODGE D200 PICKUP

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

    1971 DODGE B300 VAN

    • CC: 5899
    • Liter: 5.9
    • SubModel: SPORTSMAN
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1959-1961 CHEVROLET IMPALA

    • CC: 5704
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 348
    • EngineType: V8 ( 5.7 L / 348 )

    1965-1966 DODGE P100 VAN

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

    1968-1969 PONTIAC LEMANS

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

    1971-1972 DODGE CHARGER

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

    1968 PLYMOUTH BELVEDERE

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

    1967 PONTIAC FIREBIRD

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

    1970 DODGE POLARA

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

    1992-1993 DODGE DAKOTA

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

    1970 AMERICAN MOTORS REBEL

    • CC: 6391
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1968-1969 AMERICAN MOTORS AMX

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

    1987-1989 DODGE GRAND CARAVAN

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

    1978-1979 PLYMOUTH CARAVELLE

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

    1975-1987 JEEP J10

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

    1972 AMERICAN MOTORS JAVELIN

    • CC: 4983
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 304
    • EngineType: V8 ( 5.0 L / 304 )

    1971 PLYMOUTH SATELLITE

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

    1976-1977 DODGE ASPEN

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

    1970-1971 PLYMOUTH VALIANT

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

    1989-1993 DODGE SPIRIT

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

    1968 PLYMOUTH VALIANT

    • CC: 4473
    • Liter: 4.5
    • SubModel: 100
    • CUI: 273
    • EngineType: V8 ( 4.5 L / 273 )

    1983 PLYMOUTH HORIZON

    • EngineType: ALL
    • SubModel: CUSTOM

    1983-1990 DODGE OMNI

    • EngineType: ALL
    • SubModel: ALL

    1977-1978 DODGE MONACO

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

    1974-1977 JEEP CJ5

    • EngineType: ALL
    • SubModel: ALL

    1975-1977 PLYMOUTH GRAN FURY

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

    1989-1991 DODGE D250 PICKUP

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

    1965-1967 CHEVROLET IMPALA

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

    1975-1976 DODGE CORONET

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

    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
    • y_2017, m_12, d_15, h_24CST
    • bvseo_bulk, prod_bvqa, vn_bulk_2.0.3
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