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 |
|---|---|---|---|
| 1984-1992 | Buick | Century | Custom |
| 1984 | Buick | Century | Estate |
| 1985-1989 | Buick | Century | Estate Wagon |
| 1984-1992 | Buick | Century | Limited |
| 1984 | Buick | Century | Olympia Limited |
| 1991-1992 | Buick | Century | Special |
| 1990-1991 | Buick | Skylark | Base |
| 1983-1991 | Buick | Skylark | Custom |
| 1990-1991 | Buick | Skylark | Gran Sport |
| 1983-1989 | Buick | Skylark | Limited |
| 1990-1991 | Buick | Skylark | Luxury Edition |
| 1986-1987 | Buick | Somerset | Custom |
| 1986-1987 | Buick | Somerset | Limited |
| 1986 | Buick | Somerset | T-Type |
| 1985 | Buick | Somerset Regal | Base |
| 1985 | Buick | Somerset Regal | Limited |
| 1985-1990 | Chevrolet | Astro | Base |
| 1985 | Chevrolet | Astro | CL |
| 1985 | Chevrolet | Astro | CS |
| 1984-1986 | Chevrolet | Camaro | Sport |
| 1984-1990 | Chevrolet | Celebrity | Base |
| 1989 | Chevrolet | Celebrity | CL |
| 1985 | Chevrolet | Celebrity | Classic |
| 1985-1987 | Chevrolet | Celebrity | Estate |
| 1984-1990 | Chevrolet | Celebrity | Eurosport |
| 1984-1985 | Chevrolet | Citation II | Base |
| 1984-1985 | Chevrolet | Citation II | X-11 |
| 1987-1993 | Chevrolet | LLV | Base |
| 1990-1992 | Chevrolet | Lumina | Base |
| 1978 | Chevrolet | Monza | 2+2 |
| 1978 | Chevrolet | Monza | 2+2 Sport |
| 1978 | Chevrolet | Monza | 2+2 Spyder |
| 1978 | Chevrolet | Monza | Base |
| 1978 | Chevrolet | Monza | S |
| 1978 | Chevrolet | Monza | Sport |
| 1985-1993 | Chevrolet | S10 | Base |
| 1985-1990 | Chevrolet | S10 | Durango |
| 1992-1993 | Chevrolet | S10 | EL |
| 1985-1989 | Chevrolet | S10 | Sport |
| 1985-1992 | Chevrolet | S10 | Tahoe |
| 1985-1988 | Chevrolet | S10 Blazer | Base |
| 1987-1988 | Chevrolet | S10 Blazer | High Country |
| 1985-1988 | Chevrolet | S10 Blazer | Sport |
| 1985-1988 | Chevrolet | S10 Blazer | Tahoe |
| 1975 | Chevrolet | Vega | Base |
| 1975 | Chevrolet | Vega | Estate Wagon |
| 1975 | Chevrolet | Vega | LX |
| 1975 | Chevrolet | Vega | Panel Express |
| 1985-1990 | GMC | S15 | Base |
| 1987 | GMC | S15 | EL |
| 1986-1988 | GMC | S15 | Gypsy |
| 1985-1990 | GMC | S15 | High Sierra |
| 1985-1990 | GMC | S15 | Sierra Classic |
| 1985-1988 | GMC | S15 Jimmy | Base |
| 1985-1988 | GMC | S15 Jimmy | Gypsy |
| 1985 | GMC | S15 Jimmy | High Sierra |
| 1985-1988 | GMC | S15 Jimmy | Sierra Classic |
| 1988 | GMC | S15 Jimmy | Timberline |
| 1985-1990 | GMC | Safari | Base |
| 1985 | GMC | Safari | SL |
| 1985 | GMC | Safari | SLE |
| 1985 | GMC | Safari | SLX |
| 1991-1993 | GMC | Sonoma | Base |
| 1991-1993 | GMC | Sonoma | SLE |
| 1993 | GMC | Sonoma | SLS |
| 1985 | Oldsmobile | Calais | 500 |
| 1985-1987 | Oldsmobile | Calais | Base |
| 1986 | Oldsmobile | Calais | ES |
| 1986-1987 | Oldsmobile | Calais | GT |
| 1985-1987 | Oldsmobile | Calais | Supreme |
| 1988-1991 | Oldsmobile | Cutlass Calais | Base |
| 1988-1991 | Oldsmobile | Cutlass Calais | GT |
| 1989-1991 | Oldsmobile | Cutlass Calais | S |
| 1988-1989 | Oldsmobile | Cutlass Calais | SL |
| 1988-1992 | Oldsmobile | Cutlass Ciera | Base |
| 1984-1988 | Oldsmobile | Cutlass Ciera | Brougham |
| 1984-1985 | Oldsmobile | Cutlass Ciera | Cruiser LS |
| 1985-1986 | Oldsmobile | Cutlass Ciera | ES |
| 1986-1987 | Oldsmobile | Cutlass Ciera | GT |
| 1985-1986 | Oldsmobile | Cutlass Ciera | Holiday |
| 1984-1988 | Oldsmobile | Cutlass Ciera | LS |
| 1986-1988,1990-1991 | Oldsmobile | Cutlass Ciera | S |
| 1986-1990 | Oldsmobile | Cutlass Ciera | SL |
| 1989-1990 | Oldsmobile | Cutlass Cruiser | Base |
| 1987 | Oldsmobile | Cutlass Cruiser | Brougham |
| 1988 | Oldsmobile | Cutlass Cruiser | Brougham LS |
| 1987-1988 | Oldsmobile | Cutlass Cruiser | LS |
| 1988-1989 | Oldsmobile | Cutlass Cruiser | SL |
| 1984 | Oldsmobile | Omega | Base |
| 1984 | Oldsmobile | Omega | Brougham |
| 1984 | Oldsmobile | Omega | ES |
| 1978 | Oldsmobile | Starfire | Base |
| 1978 | Oldsmobile | Starfire | Firenza |
| 1978 | Oldsmobile | Starfire | GT |
| 1978 | Oldsmobile | Starfire | SX |
| 1984-1989 | Pontiac | 6000 | Base |
| 1984-1991 | Pontiac | 6000 | LE |
| 1975 | Pontiac | Astre | Base |
| 1975 | Pontiac | Astre | Custom |
| 1975 | Pontiac | Astre | GT |
| 1975 | Pontiac | Astre | GT Safari |
| 1975 | Pontiac | Astre | S |
| 1975 | Pontiac | Astre | S Safari |
| 1975 | Pontiac | Astre | Safari |
| 1975 | Pontiac | Astre | SJ |
| 1975 | Pontiac | Astre | SJ Safari |
| 1984-1985 | Pontiac | Fiero | Base |
| 1984-1987 | Pontiac | Fiero | SE |
| 1984-1988 | Pontiac | Fiero | Sport |
| 1986-1988 | Pontiac | Fiero | Value Leader |
| 1984-1986 | Pontiac | Firebird | Base |
| 1984 | Pontiac | Firebird | S/E |
| 1985-1988 | Pontiac | Grand Am | Base |
| 1985-1991 | Pontiac | Grand Am | LE |
| 1987 | Pontiac | Grand Am | SE |
| 1991 | Pontiac | Grand Am | Value Leader |
| 1978,1984 | Pontiac | Phoenix | Base |
| 1984 | Pontiac | Phoenix | LE |
| 1978 | Pontiac | Phoenix | LJ |
| 1978 | Pontiac | Phoenix | SJ |
| 1978 | Pontiac | Sunbird | Base |
| 1978 | Pontiac | Sunbird | Safari |