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NGK Single Iridium Spark Plug Box of 4 (UR45IX)

Unlock your engine's full potential with the NGK Single Iridium Spark Plug Box of 4 (UR45IX). Specifically designed for performance enthusiasts, these spark plugs deliver outstanding acceleration, high fuel efficiency, and durability.

With their tapered cut ground electrode and Iridium fine wire center electrode, these plugs offer extreme ignitability and exceptional anti-fouling. Perfect for modified or high-performance applications, or as an upgrade to OE nickel alloy spark plugs.

  • Outstanding acceleration and high fuel efficiency
  • Extreme ignitability and exceptional anti-fouling
  • Durable Iridium fine wire center electrode
  • Tapered cut ground electrode for improved starting and throttle response

This product fits more vehicles than loaded. Please select your vehicle to see all fits.

Make Model Year Type
American Motors Concord 1980 Base
American Motors Concord 1980 DL
American Motors Concord 1980 Limited
American Motors Concord 1981 Base
American Motors Concord 1981 DL
American Motors Concord 1981 Limited
American Motors Concord 1982 Base
American Motors Concord 1982 DL
American Motors Concord 1982 Limited
American Motors Eagle 1981 Base
American Motors Eagle 1981 DL Kammback
American Motors Eagle 1981 DL SX4
American Motors Eagle 1981 Kammback
American Motors Eagle 1981 Limited
American Motors Eagle 1981 SX4
American Motors Eagle 1982 Base
American Motors Eagle 1982 DL Kammback
American Motors Eagle 1982 DL SX4
American Motors Eagle 1982 Kammback
American Motors Eagle 1982 Limited
American Motors Eagle 1982 SX4
American Motors Eagle 1983 Base
American Motors Eagle 1983 DL SX4
American Motors Eagle 1983 Limited
American Motors Eagle 1983 SX4
American Motors Spirit 1980 Base
American Motors Spirit 1980 DL
American Motors Spirit 1980 Limited
American Motors Spirit 1981 Base
American Motors Spirit 1981 DL
American Motors Spirit 1982 Base
American Motors Spirit 1982 DL
Buick Apollo 1975 Base
Buick Apollo 1975 SR
Buick Century 1975 Base
Buick Century 1975 Custom
Buick Century 1975 Luxus
Buick Century 1976 Base
Buick Century 1976 Custom
Buick Century 1976 Indianapolis 500 Pace Car
Buick Century 1977 Base
Buick Century 1977 Custom
Buick Century 1977 Special
Buick Century 1978 Custom
Buick Century 1978 Limited
Buick Century 1978 Special
Buick Century 1978 Sport
Buick Century 1979 Custom
Buick Century 1979 Limited
Buick Century 1979 Special
Buick Century 1979 Sport
Buick Century 1980 Base
Buick Century 1980 Estate
Buick Century 1980 Limited
Buick Century 1980 Sport
Buick Century 1981 Base
Buick Century 1981 Estate
Buick Century 1981 Limited
Buick Century 1981 Sport
Buick Century 1982 Custom
Buick Century 1982 Limited
Buick Century 1983 Custom
Buick Century 1983 Limited
Buick Century 1983 T-Type
Buick Century 1984 Custom
Buick Century 1984 Estate
Buick Century 1984 Limited
Buick Century 1984 Olympia Limited
Buick Century 1984 T-Type
Buick Century 1985 Custom
Buick Century 1985 Estate Wagon
Buick Century 1985 Limited
Buick Century 1985 T-Type
Buick Electra 1977 225
Buick Electra 1977 Limited
Buick Electra 1978 225
Buick Electra 1978 Limited
Buick Electra 1978 Park Avenue
Buick Electra 1979 225
Buick Electra 1979 Limited
Buick Electra 1979 Park Avenue
Buick Electra 1980 Estate Wagon
Buick Electra 1980 Limited
Buick Electra 1980 Park Avenue
Buick Electra 1981 Limited
Buick Electra 1981 Park Avenue
Buick Electra 1982 Limited
Buick Electra 1982 Park Avenue
Buick Electra 1983 Limited
Buick Electra 1983 Park Avenue
Buick Electra 1984 Limited
Buick Electra 1984 Park Avenue
Buick Electra 1985 Limited
Buick Electra 1985 Park Avenue
Buick Electra 1985 T-Type
Buick Estate Wagon 1978 Base
Buick Estate Wagon 1979 Base
Buick Estate Wagon 1980 Base
Buick LeSabre 1975 Base
Buick LeSabre 1975 Custom
NGK manufactures spark plugs and spark plug wires, as well as glow plugs for diesel applications. Their range of spark plugs cover everything from OEM replacement to Ultimate Performance plugs, and are available as traditional copper, platinum, or iridium tips. NGK’s reputation as an OEM supplier for many car manufacturers makes them a top choice for spark plugs. Few brands can make that claim and have the quality to back it up.
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