Description

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

Specifications

Compatibility

  • 1975 Buick Apollo Base V8.-cc
  • 1975 Buick Apollo SR V8.-cc
  • 1975-1976 Buick Century Base V6.-cc
  • 1977 Buick Century Base V8.-cc
  • 1975-1976 Buick Century Custom V6.-cc
  • 1977 Buick Century Custom V8.-cc
  • 1975-1976 Buick Century Special V6.-cc
  • 1977-1979 Buick Electra 225 V8.-cc
  • 1980-1984 Buick Electra Estate Wagon V8.-cc
  • 1977-1984 Buick Electra Limited V8.-cc
  • 1978-1984 Buick Electra Park Avenue V8.-cc
  • 1977-1983 Buick Estate Wagon Base V8.-cc
  • 1976 Buick LeSabre Base V6.-cc
  • 1977-1981 Buick LeSabre Base V8.-cc
  • 1977-1978 Buick LeSabre Custom V8.-cc
  • 1982-1984 Buick LeSabre Custom V8.-cc
  • 1977 Buick LeSabre Custom Sport V8.-cc
  • 1979-1984 Buick LeSabre Limited V8.-cc
  • 1982 Buick LeSabre Limited Edition F/E V8.-cc
  • 1981 Buick LeSabre Sport V8.-cc
  • 1975-1976 Buick Regal Base V6.-cc
  • 1977 Buick Regal Base V8.-cc
  • 1976 Buick Regal SR V6.-cc
  • 1977 Buick Regal SR V8.-cc
  • 1977-1984 Buick Riviera Base V8.-cc
  • 1982 Buick Riviera Limited Edition V8.-cc
  • 1983-1984 Buick Riviera Luxury V8.-cc
  • 1978 Buick Riviera LXXV Anniversary Edition V8.-cc
  • 1979-1980 Buick Riviera S V8.-cc
  • 1981 Buick Riviera T-Type V8.-cc
  • 1983 Buick Riviera XX Anniversary Edition V8.-cc
  • 1975-1976 Buick Skyhawk Base V6.-cc
  • 1975-1976 Buick Skyhawk S V6.-cc
  • 1975-1976 Buick Skylark Base V6.-cc
  • 1975-1977 Buick Skylark Base V8.-cc
  • 1976 Buick Skylark S V6.-cc
  • 1976-1977 Buick Skylark S V8.-cc
  • 1975-1976 Buick Skylark SR V6.-cc
  • 1975-1977 Buick Skylark SR V8.-cc
  • 1979-1980 Cadillac Eldorado Base V8.-cc
  • 1979-1980 Cadillac Eldorado Biarritz V8.-cc
  • 1979-1980 Cadillac Eldorado Cabriolet V8.-cc
  • 1976-1980 Cadillac Seville Base V8.-cc
  • 1978-1980 Cadillac Seville Elegante V8.-cc
  • 1977-1978 Cadillac Seville Opera V8.-cc
  • 1973-1974 Oldsmobile 98 Base V8.7456cc
  • 1973-1974 Oldsmobile 98 Base V8.7457cc
  • 1977-1981 Oldsmobile 98 Luxury V8.-cc
  • 1977-1984 Oldsmobile 98 Regency V8.-cc
  • 1973-1974 Oldsmobile 98 Regency V8.7456cc
  • 1973-1974 Oldsmobile 98 Regency V8.7457cc
  • 1982-1984 Oldsmobile 98 Regency Brougham V8.-cc
  • 1977-1984 Oldsmobile Custom Cruiser Base V8.-cc
  • 1973-1974 Oldsmobile Custom Cruiser Base V8.7456cc
  • 1973-1974 Oldsmobile Custom Cruiser Base V8.7457cc
  • 1975 Oldsmobile Cutlass 442 V8.-cc
  • 1977 Oldsmobile Cutlass 442 V8.-cc
  • 1975 Oldsmobile Cutlass Base V8.-cc
  • 1980 Oldsmobile Cutlass Base V8.-cc
  • 1980-1981 Oldsmobile Cutlass Brougham V8.-cc
  • 1977 Oldsmobile Cutlass Colonnade V8.-cc
  • 1976-1977 Oldsmobile Cutlass Colonnade S V8.-cc
  • 1980-1981 Oldsmobile Cutlass LS V8.-cc
  • 1975-1977 Oldsmobile Cutlass S V8.-cc
  • 1976-1979 Oldsmobile Cutlass Vista Cruiser V8.-cc
  • 1979 Oldsmobile Cutlass Vista Cruiser Brougham V8.-cc
  • 1978-1984 Oldsmobile Cutlass Calais Base V8.-cc
  • 1983-1984 Oldsmobile Cutlass Calais Hurst V8.-cc
  • 1980-1983 Oldsmobile Cutlass Cruiser Base V8.-cc
  • 1980-1981 Oldsmobile Cutlass Cruiser Brougham V8.-cc
  • 1979 Oldsmobile Cutlass Salon 442 V8.-cc
  • 1975-1980 Oldsmobile Cutlass Salon Base V8.-cc
  • 1985 Oldsmobile Cutlass Salon Base V8.-cc
  • 1978-1980 Oldsmobile Cutlass Salon Brougham V8.-cc
  • 1979 Oldsmobile Cutlass Salon Hurst V8.-cc
  • 1975-1984 Oldsmobile Cutlass Supreme Base V8.-cc
  • 1977-1984 Oldsmobile Cutlass Supreme Brougham V8.-cc
  • 1976-1977 Oldsmobile Cutlass Supreme Colonnade V8.-cc
  • 1975 Oldsmobile Cutlass Supreme Cruiser V8.-cc
  • 1975 Oldsmobile Cutlass Supreme Hurst V8.-cc
  • 1981 Oldsmobile Cutlass Supreme LS V8.-cc
  • 1976 Oldsmobile Cutlass Tiara Base V8.-cc
  • 1975-1983 Oldsmobile Delta 88 Base V8.-cc
  • 1973-1974 Oldsmobile Delta 88 Base V8.7456cc
  • 1973-1974 Oldsmobile Delta 88 Base V8.7457cc
  • 1980-1981 Oldsmobile Delta 88 Holiday V8.-cc
  • 1975-1984 Oldsmobile Delta 88 Royale V8.-cc
  • 1973-1974 Oldsmobile Delta 88 Royale V8.7456cc
  • 1973-1974 Oldsmobile Delta 88 Royale V8.7457cc
  • 1980-1984 Oldsmobile Delta 88 Royale Brougham V8.-cc
  • 1984 Oldsmobile Delta 88 Royale Brougham LS V8.-cc
  • 1975-1977 Oldsmobile Omega Base V8.-cc
  • 1976 Oldsmobile Omega Base V8.5733cc
  • 1976-1977 Oldsmobile Omega Brougham V8.-cc
  • 1976 Oldsmobile Omega Brougham V8.5733cc
  • 1977 Oldsmobile Omega Deluxe V8.-cc
  • 1976-1977 Oldsmobile Omega F85 V8.-cc
  • 1976 Oldsmobile Omega F85 V8.5733cc
  • 1975 Oldsmobile Omega Salon V8.-cc
  • 1976-1977 Oldsmobile Omega SX V8.-cc
  • 1976 Oldsmobile Omega SX V8.5733cc
  • 1975-1976 Oldsmobile Starfire Base V6.-cc
  • 1976 Oldsmobile Starfire GT V6.-cc
  • 1975 Oldsmobile Starfire S V6.-cc
  • 1976 Oldsmobile Starfire SX V6.-cc
  • 1973-1974 Oldsmobile Toronado Base V8.7456cc
  • 1973-1974 Oldsmobile Toronado Brougham V8.-cc
  • 1977-1984 Oldsmobile Toronado Brougham V8.-cc
  • 1977 Oldsmobile Toronado XS V8.-cc
  • 1980-1981 Oldsmobile Toronado XSC V8.-cc
  • 1977-1979 Oldsmobile Toronado XSR V8.-cc
  • 1977-1981 Pontiac Bonneville Base V8.-cc
  • 1977-1981 Pontiac Bonneville Brougham V8.-cc
  • 1978-1981 Pontiac Bonneville Safari V8.-cc
  • 1977-1981 Pontiac Catalina Base V8.-cc
  • 1977-1981 Pontiac Catalina Safari V8.-cc
  • 1977 Pontiac Firebird Base V8.-cc
  • 1977 Pontiac Firebird Esprit V8.-cc
  • 1977-1979 Pontiac Firebird Formula V8.-cc
  • 1977-1979 Pontiac Firebird Trans Am V8.-cc
  • 1976-1977 Pontiac Grand LeMans Base V8.-cc
  • 1977 Pontiac Grand LeMans Safari V8.-cc
  • 1977 Pontiac Grand Prix Base V8.-cc
  • 1977 Pontiac Grand Prix LJ V8.-cc
  • 1977 Pontiac Grand Prix SJ V8.-cc
  • 1977-1978 Pontiac Grand Safari Base V8.-cc
  • 1976-1977 Pontiac LeMans Base V8.-cc
  • 1977 Pontiac LeMans Safari V8.-cc
  • 1976-1977 Pontiac LeMans Sport V8.-cc
  • 1977 Pontiac Phoenix Base V8.-cc
  • 1976 Pontiac Sunbird Base V6.-cc
  • 1976 Pontiac Sunbird SJ V6.-cc
  • 1975-1977 Pontiac Ventura Base V8.-cc
  • 1975 Pontiac Ventura Custom V8.-cc
  • 1975 Pontiac Ventura S V8.-cc
  • 1975-1977 Pontiac Ventura SJ V8.-cc

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

  • 1975 Buick Apollo Base V8.-cc
  • 1975 Buick Apollo SR V8.-cc
  • 1975-1976 Buick Century Base V6.-cc
  • 1977 Buick Century Base V8.-cc
  • 1975-1976 Buick Century Custom V6.-cc
  • 1977 Buick Century Custom V8.-cc
  • 1975-1976 Buick Century Special V6.-cc
  • 1977-1979 Buick Electra 225 V8.-cc
  • 1980-1984 Buick Electra Estate Wagon V8.-cc
  • 1977-1984 Buick Electra Limited V8.-cc
  • 1978-1984 Buick Electra Park Avenue V8.-cc
  • 1977-1983 Buick Estate Wagon Base V8.-cc
  • 1976 Buick LeSabre Base V6.-cc
  • 1977-1981 Buick LeSabre Base V8.-cc
  • 1977-1978 Buick LeSabre Custom V8.-cc
  • 1982-1984 Buick LeSabre Custom V8.-cc
  • 1977 Buick LeSabre Custom Sport V8.-cc
  • 1979-1984 Buick LeSabre Limited V8.-cc
  • 1982 Buick LeSabre Limited Edition F/E V8.-cc
  • 1981 Buick LeSabre Sport V8.-cc
  • 1975-1976 Buick Regal Base V6.-cc
  • 1977 Buick Regal Base V8.-cc
  • 1976 Buick Regal SR V6.-cc
  • 1977 Buick Regal SR V8.-cc
  • 1977-1984 Buick Riviera Base V8.-cc
  • 1982 Buick Riviera Limited Edition V8.-cc
  • 1983-1984 Buick Riviera Luxury V8.-cc
  • 1978 Buick Riviera LXXV Anniversary Edition V8.-cc
  • 1979-1980 Buick Riviera S V8.-cc
  • 1981 Buick Riviera T-Type V8.-cc
  • 1983 Buick Riviera XX Anniversary Edition V8.-cc
  • 1975-1976 Buick Skyhawk Base V6.-cc
  • 1975-1976 Buick Skyhawk S V6.-cc
  • 1975-1976 Buick Skylark Base V6.-cc
  • 1975-1977 Buick Skylark Base V8.-cc
  • 1976 Buick Skylark S V6.-cc
  • 1976-1977 Buick Skylark S V8.-cc
  • 1975-1976 Buick Skylark SR V6.-cc
  • 1975-1977 Buick Skylark SR V8.-cc
  • 1979-1980 Cadillac Eldorado Base V8.-cc
  • 1979-1980 Cadillac Eldorado Biarritz V8.-cc
  • 1979-1980 Cadillac Eldorado Cabriolet V8.-cc
  • 1976-1980 Cadillac Seville Base V8.-cc
  • 1978-1980 Cadillac Seville Elegante V8.-cc
  • 1977-1978 Cadillac Seville Opera V8.-cc
  • 1973-1974 Oldsmobile 98 Base V8.7456cc
  • 1973-1974 Oldsmobile 98 Base V8.7457cc
  • 1977-1981 Oldsmobile 98 Luxury V8.-cc
  • 1977-1984 Oldsmobile 98 Regency V8.-cc
  • 1973-1974 Oldsmobile 98 Regency V8.7456cc
  • 1973-1974 Oldsmobile 98 Regency V8.7457cc
  • 1982-1984 Oldsmobile 98 Regency Brougham V8.-cc
  • 1977-1984 Oldsmobile Custom Cruiser Base V8.-cc
  • 1973-1974 Oldsmobile Custom Cruiser Base V8.7456cc
  • 1973-1974 Oldsmobile Custom Cruiser Base V8.7457cc
  • 1975 Oldsmobile Cutlass 442 V8.-cc
  • 1977 Oldsmobile Cutlass 442 V8.-cc
  • 1975 Oldsmobile Cutlass Base V8.-cc
  • 1980 Oldsmobile Cutlass Base V8.-cc
  • 1980-1981 Oldsmobile Cutlass Brougham V8.-cc
  • 1977 Oldsmobile Cutlass Colonnade V8.-cc
  • 1976-1977 Oldsmobile Cutlass Colonnade S V8.-cc
  • 1980-1981 Oldsmobile Cutlass LS V8.-cc
  • 1975-1977 Oldsmobile Cutlass S V8.-cc
  • 1976-1979 Oldsmobile Cutlass Vista Cruiser V8.-cc
  • 1979 Oldsmobile Cutlass Vista Cruiser Brougham V8.-cc
  • 1978-1984 Oldsmobile Cutlass Calais Base V8.-cc
  • 1983-1984 Oldsmobile Cutlass Calais Hurst V8.-cc
  • 1980-1983 Oldsmobile Cutlass Cruiser Base V8.-cc
  • 1980-1981 Oldsmobile Cutlass Cruiser Brougham V8.-cc
  • 1979 Oldsmobile Cutlass Salon 442 V8.-cc
  • 1975-1980 Oldsmobile Cutlass Salon Base V8.-cc
  • 1985 Oldsmobile Cutlass Salon Base V8.-cc
  • 1978-1980 Oldsmobile Cutlass Salon Brougham V8.-cc
  • 1979 Oldsmobile Cutlass Salon Hurst V8.-cc
  • 1975-1984 Oldsmobile Cutlass Supreme Base V8.-cc
  • 1977-1984 Oldsmobile Cutlass Supreme Brougham V8.-cc
  • 1976-1977 Oldsmobile Cutlass Supreme Colonnade V8.-cc
  • 1975 Oldsmobile Cutlass Supreme Cruiser V8.-cc
  • 1975 Oldsmobile Cutlass Supreme Hurst V8.-cc
  • 1981 Oldsmobile Cutlass Supreme LS V8.-cc
  • 1976 Oldsmobile Cutlass Tiara Base V8.-cc
  • 1975-1983 Oldsmobile Delta 88 Base V8.-cc
  • 1973-1974 Oldsmobile Delta 88 Base V8.7456cc
  • 1973-1974 Oldsmobile Delta 88 Base V8.7457cc
  • 1980-1981 Oldsmobile Delta 88 Holiday V8.-cc
  • 1975-1984 Oldsmobile Delta 88 Royale V8.-cc
  • 1973-1974 Oldsmobile Delta 88 Royale V8.7456cc
  • 1973-1974 Oldsmobile Delta 88 Royale V8.7457cc
  • 1980-1984 Oldsmobile Delta 88 Royale Brougham V8.-cc
  • 1984 Oldsmobile Delta 88 Royale Brougham LS V8.-cc
  • 1975-1977 Oldsmobile Omega Base V8.-cc
  • 1976 Oldsmobile Omega Base V8.5733cc
  • 1976-1977 Oldsmobile Omega Brougham V8.-cc
  • 1976 Oldsmobile Omega Brougham V8.5733cc
  • 1977 Oldsmobile Omega Deluxe V8.-cc
  • 1976-1977 Oldsmobile Omega F85 V8.-cc
  • 1976 Oldsmobile Omega F85 V8.5733cc
  • 1975 Oldsmobile Omega Salon V8.-cc
  • 1976-1977 Oldsmobile Omega SX V8.-cc
  • 1976 Oldsmobile Omega SX V8.5733cc
  • 1975-1976 Oldsmobile Starfire Base V6.-cc
  • 1976 Oldsmobile Starfire GT V6.-cc
  • 1975 Oldsmobile Starfire S V6.-cc
  • 1976 Oldsmobile Starfire SX V6.-cc
  • 1973-1974 Oldsmobile Toronado Base V8.7456cc
  • 1973-1974 Oldsmobile Toronado Brougham V8.-cc
  • 1977-1984 Oldsmobile Toronado Brougham V8.-cc
  • 1977 Oldsmobile Toronado XS V8.-cc
  • 1980-1981 Oldsmobile Toronado XSC V8.-cc
  • 1977-1979 Oldsmobile Toronado XSR V8.-cc
  • 1977-1981 Pontiac Bonneville Base V8.-cc
  • 1977-1981 Pontiac Bonneville Brougham V8.-cc
  • 1978-1981 Pontiac Bonneville Safari V8.-cc
  • 1977-1981 Pontiac Catalina Base V8.-cc
  • 1977-1981 Pontiac Catalina Safari V8.-cc
  • 1977 Pontiac Firebird Base V8.-cc
  • 1977 Pontiac Firebird Esprit V8.-cc
  • 1977-1979 Pontiac Firebird Formula V8.-cc
  • 1977-1979 Pontiac Firebird Trans Am V8.-cc
  • 1976-1977 Pontiac Grand LeMans Base V8.-cc
  • 1977 Pontiac Grand LeMans Safari V8.-cc
  • 1977 Pontiac Grand Prix Base V8.-cc
  • 1977 Pontiac Grand Prix LJ V8.-cc
  • 1977 Pontiac Grand Prix SJ V8.-cc
  • 1977-1978 Pontiac Grand Safari Base V8.-cc
  • 1976-1977 Pontiac LeMans Base V8.-cc
  • 1977 Pontiac LeMans Safari V8.-cc
  • 1976-1977 Pontiac LeMans Sport V8.-cc
  • 1977 Pontiac Phoenix Base V8.-cc
  • 1976 Pontiac Sunbird Base V6.-cc
  • 1976 Pontiac Sunbird SJ V6.-cc
  • 1975-1977 Pontiac Ventura Base V8.-cc
  • 1975 Pontiac Ventura Custom V8.-cc
  • 1975 Pontiac Ventura S V8.-cc
  • 1975-1977 Pontiac Ventura SJ V8.-cc

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