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