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NGK Spark Plugs XR4

V-Power Resistor Spark Plug 14mm x 3/8" Reach

NGK Spark Plugs XR4

739-XR4

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NGK Spark Plugs XR4 V-Power Resistor Spark Plug 14mm x 3/8" Reach $1.69
V-Power Resistor Spark Plug
  • 14mm x 3/8" Reach
  • 13/16" Hex
  • Projected
  • Gasket seat

  • Specifications:

    Manufacturer's Part Number:
    XR4

    Modern, lean-burning, fuel-efficient engines call for new lower sparking voltage requirements. NGK Spark Plugs responded by developing V-Power Spark Plugs with V-groove center electrodes. The V-groove center electrode forces the spark to the ground electrode's outer edge, placing the spark closer to the air/fuel mixture to ignite it quicker for more complete combustion (thus greater power & less harmful emissions).

    Today's performance engines are often high-compression/high-stress: supercharged, turbocharged, or fed by nitrous oxide. Ideal for high-performance street and race cars, NGK's patented V-groove design allows an ignition system to spark easily in such dense air/fuel mixtures. The flame kernel grows rapidly and enables an engine to potentially make more power because it's operating more efficiently. As a bonus, the spark's outer edge location helps limit the quenching effect, reducing misfires caused by high cylinder pressures "blowing out" the spark. V-Power Spark Plugs also use lower ignition firing voltage, which results in faster starts and easier cold starts throughout the life of the plugs. Sold individually.

    JEGS Easy Kits are designed by JEGS Professionals to help you get all the performance parts you need.

    Does NGK Spark Plugs XR4 fit your vehicle?

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    Aspiration

    1951-1953 BUICK SPECIAL

    • CC: 4311
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 263
    • EngineType: L8 ( 4.3 L / 263 )

    1970 DODGE CORONET

    • CC: 7211
    • Liter: 7.2
    • SubModel: SUPER BEE
    • CUI: 440
    • EngineType: V8 ( 7.2 L / 440 )

    1971 PONTIAC CATALINA

    • EngineType: ALL
    • SubModel: BROUGHAM

    1966-1971 JEEP CJ6

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

    1960-1963 PLYMOUTH FLEET SPECIAL

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

    1968 PONTIAC TEMPEST

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

    1969 OLDSMOBILE DELTA 88

    • EngineType: ALL
    • SubModel: ROYALE

    1956-1957 PLYMOUTH SUBURBAN

    • CC: 4540
    • Liter: 4.5
    • SubModel: BASE
    • CUI: 277
    • EngineType: V8 ( 4.5 L / 277 )

    1957-1958 CHEVROLET BEL AIR

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

    1968 CHEVROLET CHEVELLE

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

    1959-1960 CHRYSLER TOWN & COUNTRY

    • EngineType: ALL
    • SubModel: ALL

    1970 PONTIAC LEMANS

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

    1963 BUICK SPECIAL

    • CC: 3245
    • Liter: 3.2
    • SubModel: DELUXE
    • CUI: 198
    • EngineType: V6 ( 3.2 L / 198 )

    1970-1971 OLDSMOBILE 442

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

    1967-1971 DODGE W100 PICKUP

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

    1956 PLYMOUTH FURY

    • CC: 4540
    • Liter: 4.5
    • SubModel: BASE
    • CUI: 277
    • EngineType: V8 ( 4.5 L / 277 )

    1970-1971 PONTIAC LEMANS

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

    1957 PLYMOUTH SUBURBAN

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

    1966 DODGE MONACO

    • CC: 7211
    • Liter: 7.2
    • SubModel: BASE
    • CUI: 440
    • EngineType: V8 ( 7.2 L / 440 )

    1968 DODGE CORONET

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

    1956 PLYMOUTH SAVOY

    • CC: 4540
    • Liter: 4.5
    • SubModel: BASE
    • CUI: 277
    • EngineType: V8 ( 4.5 L / 277 )

    1959 CHEVROLET BISCAYNE

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

    1959-1960 PONTIAC CATALINA

    • EngineType: ALL
    • SubModel: ALL

    1967-1968 DODGE CHARGER

    • CC: 7211
    • Liter: 7.2
    • SubModel: R/T
    • CUI: 440
    • EngineType: V8 ( 7.2 L / 440 )

    1975-1976 DODGE CORONET

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

    1966-1969 JEEP JEEPSTER

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

    1975 OLDSMOBILE CUSTOM CRUISER

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

    1973 OLDSMOBILE OMEGA

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

    1956-1957 PLYMOUTH SUBURBAN

    • CC: 4540
    • Liter: 4.5
    • SubModel: BASE
    • CUI: 277
    • EngineType: V8 ( 4.5 L / 277 )

    1970-1971 PONTIAC GRAND PRIX

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

    1960-1961 DODGE CUSTOM

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

    1967 CADILLAC CALAIS

    • EngineType: ALL
    • SubModel: ALL

    1961-1962 CHEVROLET IMPALA

    • CC: 3852
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 235
    • EngineType: L6 ( 3.8 L / 235 )

    1956 PLYMOUTH FURY

    • Liter: 4.5
    • SubModel: BASE
    • CUI: 276
    • EngineType: V8 ( 4.5 L / 276 )

    1964-1966 PONTIAC GTO

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

    1950-1953 CHEVROLET BEL AIR

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

    1968 CHEVROLET CHEVELLE

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

    1963-1966 PLYMOUTH FURY

    • Liter: 6.3
    • SubModel: SPORT
    • CUI: 383
    • EngineType: V8 ( 6.3 L / 383 )

    1958-1959 PLYMOUTH BELVEDERE

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

    1971 OLDSMOBILE CUSTOM CRUISER

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

    1966 DODGE CORONET

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

    1969 OLDSMOBILE VISTA CRUISER

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

    1968 CHEVROLET CHEVY II

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

    1970 PONTIAC FIREBIRD

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

    1957-1958 CHRYSLER TOWN & COUNTRY

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

    1955-1956 DODGE CORONET

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

    1959 PLYMOUTH BELVEDERE

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

    1969 OLDSMOBILE F85

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

    1954 DODGE CUSTOM

    • CC: 3957
    • Liter: 4.0
    • SubModel: BASE
    • CUI: 241
    • EngineType: V8 ( 4.0 L / 241 )

    1966-1971 JEEP CJ5

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

    1970 PONTIAC EXECUTIVE

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

    1968 OLDSMOBILE CUTLASS

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

    1964-1965 BUICK WILDCAT

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

    1963 CHRYSLER TOWN & COUNTRY

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

    1969-1971 OLDSMOBILE CUTLASS

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

    1963 CHRYSLER NEWPORT

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

    1966 JEEP FC170

    • CC: 3704
    • Liter: 3.7
    • SubModel: BASE
    • CUI: 226
    • EngineType: L6 ( 3.7 L / 226 )

    1960 CHEVROLET BISCAYNE

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

    1968 PONTIAC TEMPEST

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

    1967 DODGE POLARA

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

    1975-1977 DODGE ROYAL MONACO

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

    1975-1976 CHRYSLER NEWPORT

    • CC: 7211
    • Liter: 7.2
    • SubModel: CUSTOM
    • CUI: 440
    • EngineType: V8 ( 7.2 L / 440 )

    1974 DODGE MONACO

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

    1970 OLDSMOBILE DELTA 88

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

    1972-1974 CHRYSLER NEWPORT

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

    1959-1960 CHRYSLER NEWPORT

    • EngineType: ALL
    • SubModel: ALL

    1961 CHRYSLER TOWN & COUNTRY

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

    1968 PONTIAC TEMPEST

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

    1967 DODGE CHARGER

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

    1972 CHRYSLER TOWN & COUNTRY

    • EngineType: ALL
    • SubModel: ALL

    1962 PONTIAC CATALINA

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

    1967-1969 CHRYSLER NEW YORKER

    • CC: 7211
    • Liter: 7.2
    • SubModel: BASE
    • CUI: 440
    • EngineType: V8 ( 7.2 L / 440 )

    1970 DODGE CORONET

    • CC: 7211
    • Liter: 7.2
    • SubModel: DELUXE
    • CUI: 440
    • EngineType: V8 ( 7.2 L / 440 )

    1975 CHRYSLER TOWN & COUNTRY

    • CC: 7211
    • Liter: 7.2
    • SubModel: BASE
    • CUI: 440
    • EngineType: V8 ( 7.2 L / 440 )

    1969 DODGE POLARA

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

    1965-1967 DODGE CORONET

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

    1966-1967 JEEP COMMANDO

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

    1968 CHEVROLET CHEVELLE

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

    1966-1968 JEEP DJ5

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

    1968-1971 OLDSMOBILE VISTA CRUISER

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

    1963-1965 DODGE POLARA

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

    1974 OLDSMOBILE CUTLASS SUPREME

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

    1958 PLYMOUTH SUBURBAN

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

    1968-1971 DODGE D200 PICKUP

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

    1968-1969 CHEVROLET CAPRICE

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

    1967 CHEVROLET CHEVELLE

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

    1963-1965 BUICK RIVIERA

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

    1960-1966 PLYMOUTH FURY

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

    1971 OLDSMOBILE DELTA 88

    • EngineType: ALL
    • SubModel: ROYALE

    1968-1969 CHEVROLET CAMARO

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

    1973-1974 CHRYSLER NEWPORT

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

    1972-1973 DODGE POLARA

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

    1957 PLYMOUTH PLAZA

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

    1972 CHRYSLER NEWPORT

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

    1957-1958 DODGE CORONET

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

    1968 CHEVROLET CAPRICE

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

    1969-1971 DODGE W200 PICKUP

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

    1963 BUICK WILDCAT

    • EngineType: ALL
    • SubModel: ALL

    1970-1974 OLDSMOBILE VISTA CRUISER

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

    1972-1974 DODGE CORONET

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