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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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    1982 OLDSMOBILE FIRENZA

    • EngineType: ALL
    • SubModel: SX

    1981-1982 DODGE D250 PICKUP

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

    1983 PLYMOUTH PB150 VAN

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

    1973 PLYMOUTH FURY

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

    1974 PLYMOUTH PB300 VAN

    • EngineType: ALL
    • SubModel: VOYAGER EX

    1967-1968 AMERICAN MOTORS REBEL

    • EngineType: ALL
    • SubModel: SST

    1971-1972 DODGE DART

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

    1971 DODGE CORONET

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

    1967 DODGE D200 SERIES

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

    1992-1995 DODGE DAKOTA

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

    1967-1968 PLYMOUTH BELVEDERE

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

    1973 DODGE B100 VAN

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

    1981-1984 DODGE ARIES

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

    1989 CHRYSLER TC MASERATI

    • EngineType: ALL
    • SubModel: ALL

    1974 DODGE B100 VAN

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

    1970 BENTLEY T1 SERIES

    • CC: 6230
    • Liter: 6.2
    • SubModel: H.J. MULLINER
    • EngineType: V8 ( 6.2 L / 6230 CC )

    1968-1969 AMERICAN MOTORS JAVELIN

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

    1968 AMERICAN MOTORS REBEL

    • CC: 3802
    • Liter: 3.8
    • SubModel: 550
    • CUI: 232
    • EngineType: L6 ( 3.8 L / 232 )

    1969-1970 DODGE CORONET

    • CC: 5212
    • Liter: 5.2
    • SubModel: 440
    • CUI: 318
    • EngineType: V8 ( 5.2 L / 318 )

    1981-1982 CHRYSLER CORDOBA

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

    1987 DODGE CHARGER

    • EngineType: ALL
    • SubModel: ALL

    1977-1978 DODGE MONACO

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

    1964-1969 CHEVROLET CHEVELLE

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

    1988-1990 DODGE D150 PICKUP

    • CC: 3906
    • Liter: 3.9
    • SubModel: BASE
    • CUI: 239
    • EngineType: V6 ( 3.9 L / 239 )

    1986-1987 DODGE D250 PICKUP

    • EngineType: ALL
    • SubModel: ADVENTURER

    1968 DODGE CORONET

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

    1960-1961 DODGE DART

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

    1977-1980 DODGE D200 PICKUP

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

    1967 GMC G25/G2500 VAN

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

    1967 CHEVROLET CHEVELLE

    • Liter: 3.8
    • SubModel: DELUXE
    • 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 )

    1965-1967 PLYMOUTH VALIANT

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

    1968 PLYMOUTH FURY

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

    1975-1980 DODGE W200 PICKUP

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

    1971 AMERICAN MOTORS HORNET

    • EngineType: ALL
    • SubModel: BASE

    1968-1969 CADILLAC FLEETWOOD

    • EngineType: ALL
    • SubModel: ALL

    1993-1994 PLYMOUTH SUNDANCE

    • EngineType: ALL
    • SubModel: BASE

    1969-1971 PLYMOUTH FURY

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

    1967 DODGE W200 PICKUP

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

    1985-1986 DODGE CHARGER

    • EngineType: ALL
    • SubModel: SHELBY

    1963-1968 DODGE DART

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

    1977-1980 DODGE D200 PICKUP

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

    1968 PLYMOUTH FURY

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

    1970 BENTLEY T1 SERIES

    • CC: 6750
    • Liter: 6.8
    • SubModel: H.J. MULLINER
    • CUI: 412
    • EngineType: V8 ( 6.8 L / 412 )

    1981-1983 JEEP CHEROKEE (SJ)

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

    1977-1979 DODGE D300 PICKUP

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

    1974 PLYMOUTH PB300 VAN

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

    1976-1978 PLYMOUTH FURY

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

    1989-1992 DODGE D250 PICKUP

    • EngineType: ALL
    • SubModel: ADVENTURER

    1971 DODGE MONACO

    • CC: 5900
    • Liter: 5.9
    • SubModel: BASE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1958 DODGE CORONET

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

    1969 DODGE DART

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

    1971-1980 BENTLEY CORNICHE

    • EngineType: ALL
    • SubModel: ALL

    1968 DODGE CHARGER

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

    1965 AMERICAN MOTORS MARLIN

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

    1971 DODGE DART

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

    1968 PLYMOUTH BARRACUDA

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

    1967 DODGE CHARGER

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

    1970 AMERICAN MOTORS REBEL

    • CC: 5900
    • Liter: 5.9
    • SubModel: BASE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1968-1969 PONTIAC FIREBIRD

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

    1972-1973 JEEP WAGONEER

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

    1970 DODGE A100 PICKUP

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

    1976-1978 DODGE B100 VAN

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

    1968-1969 BUICK SKYLARK

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

    1966 PLYMOUTH BARRACUDA

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

    1968-1969 GMC G25/G2500 VAN

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

    1974-1980 PLYMOUTH TRAILDUSTER

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

    1971 DODGE POLARA

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

    1978-1983 JEEP CHEROKEE (SJ)

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

    1967-1970 DODGE CORONET

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

    1968 GMC C25/C2500 SUBURBAN

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

    1968-1974 DODGE D200 PICKUP

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

    1963-1965 CHEVROLET C20 PICKUP

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

    1971 DODGE POLARA

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

    1970 BENTLEY T1 SERIES

    • CC: 6750
    • Liter: 6.8
    • SubModel: JAMES YOUNG
    • CUI: 412
    • EngineType: V8 ( 6.8 L / 412 )

    1968 PLYMOUTH VALIANT

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

    1957-1958 DODGE CORONET

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

    1980 PLYMOUTH GRAN FURY

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

    1969 AMERICAN MOTORS RAMBLER

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

    1972-1974 PLYMOUTH GRAN FURY

    • CC: 5900
    • Liter: 5.9
    • SubModel: BASE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1984-1989 DODGE DAYTONA

    • EngineType: ALL
    • SubModel: ALL

    1971 DODGE DART

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

    1979 DODGE D100 PICKUP

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

    1963-1966 GMC SUBURBAN

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

    1974 JEEP J10

    • EngineType: ALL
    • SubModel: ALL

    1988-1991 DODGE CARAVAN

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

    1975-1976 DODGE CORONET

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

    1969 DODGE DART

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

    1989-1990 PONTIAC LEMANS

    • EngineType: ALL
    • SubModel: GSE

    1968-1969 AMERICAN MOTORS AMBASSADOR

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

    1967 GMC C35/C3500 PICKUP

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

    1969 GMC K25/K2500 SUBURBAN

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

    1974 PLYMOUTH ROAD RUNNER

    • CC: 5900
    • Liter: 5.9
    • SubModel: BASE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1968-1969 BUICK SKYLARK

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

    1969 AMERICAN MOTORS AMBASSADOR

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

    1991 DODGE D150 PICKUP

    • EngineType: ALL
    • SubModel: ALL

    1969-1970 INTERNATIONAL M1100

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

    1979 DODGE DIPLOMAT

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

    1980 PLYMOUTH PB200 VAN

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

    1967 CHEVROLET CHEVELLE

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

    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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