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 |
|---|---|---|---|
| 1980-1982 | American Motors | Concord | Base |
| 1980-1982 | American Motors | Concord | DL |
| 1980-1982 | American Motors | Concord | Limited |
| 1981-1983 | American Motors | Eagle | Base |
| 1981-1982 | American Motors | Eagle | DL Kammback |
| 1981-1983 | American Motors | Eagle | DL SX4 |
| 1981-1982 | American Motors | Eagle | Kammback |
| 1981-1983 | American Motors | Eagle | Limited |
| 1981-1983 | American Motors | Eagle | SX4 |
| 1980-1982 | American Motors | Spirit | Base |
| 1980-1982 | American Motors | Spirit | DL |
| 1980 | American Motors | Spirit | Limited |
| 1975 | Buick | Apollo | Base |
| 1975 | Buick | Apollo | SR |
| 1975-1977,1980-1981 | Buick | Century | Base |
| 1975-1979,1982-1985 | Buick | Century | Custom |
| 1980-1981,1984 | Buick | Century | Estate |
| 1985 | Buick | Century | Estate Wagon |
| 1976 | Buick | Century | Indianapolis 500 Pace Car |
| 1978-1985 | Buick | Century | Limited |
| 1975 | Buick | Century | Luxus |
| 1984 | Buick | Century | Olympia Limited |
| 1977-1979 | Buick | Century | Special |
| 1978-1981 | Buick | Century | Sport |
| 1983-1985 | Buick | Century | T-Type |
| 1977-1979 | Buick | Electra | 225 |
| 1980 | Buick | Electra | Estate Wagon |
| 1977-1985 | Buick | Electra | Limited |
| 1978-1985 | Buick | Electra | Park Avenue |
| 1985 | Buick | Electra | T-Type |
| 1978-1980 | Buick | Estate Wagon | Base |
| 1975,1977-1981 | Buick | LeSabre | Base |
| 1985 | Buick | LeSabre | Collector's Edition |
| 1975-1978,1982-1985 | Buick | LeSabre | Custom |
| 1977 | Buick | LeSabre | Custom Sport |
| 1979-1985 | Buick | LeSabre | Limited |
| 1982 | Buick | LeSabre | Limited Edition F/E |
| 1978,1981 | Buick | LeSabre | Sport |
| 1975-1987 | Buick | Regal | Base |
| 1982-1983 | Buick | Regal | Estate Wagon |
| 1978-1987 | Buick | Regal | Limited |
| 1982 | Buick | Regal | Limited Turbo |
| 1978,1982 | Buick | Regal | Sport |
| 1976-1977 | Buick | Regal | SR |
| 1983 | Buick | Regal | T-Type |
| 1977-1978,1981-1984 | Buick | Riviera | Base |
| 1982 | Buick | Riviera | Limited Edition |
| 1983-1984 | Buick | Riviera | Luxury |
| 1978 | Buick | Riviera | LXXV Anniversary Edition |
| 1981-1983 | Buick | Riviera | T-Type |
| 1983 | Buick | Riviera | XX Anniversary Edition |
| 1977-1980 | Buick | Skyhawk | Base |
| 1980 | Buick | Skyhawk | Designers' Accent Edition |
| 1979-1980 | Buick | Skyhawk | Road Hawk |
| 1977-1980 | Buick | Skyhawk | S |
| 1975-1982 | Buick | Skylark | Base |
| 1978-1979 | Buick | Skylark | Custom |
| 1980-1982 | Buick | Skylark | Limited |
| 1976-1979 | Buick | Skylark | S |
| 1978,1980-1982 | Buick | Skylark | Sport |
| 1975-1977 | Buick | Skylark | SR |
| 1980-1982 | Cadillac | DeVille | Base |
| 1980-1982 | Cadillac | DeVille | Cabriolet |
| 1980-1982 | Cadillac | DeVille | d'Elegance |
| 1981-1982 | Cadillac | Eldorado | Base |
| 1981-1982 | Cadillac | Eldorado | Biarritz |
| 1981 | Cadillac | Eldorado | Brougham d'Elegance |
| 1981-1982 | Cadillac | Eldorado | Cabriolet |
| 1982 | Cadillac | Eldorado | Touring |
| 1980-1982 | Cadillac | Fleetwood | Brougham |
| 1980-1982 | Cadillac | Fleetwood | Brougham d'Elegance |
| 1981-1982 | Cadillac | Seville | Base |
| 1981-1982 | Cadillac | Seville | Elegante |
| 1975 | Checker | Marathon | Aerobus |
| 1975,1977,1979-1982 | Checker | Marathon | Base |
| 1975,1977,1979-1982 | Checker | Marathon | Deluxe |
| 1971 | Chevrolet | Brookwood | Base |
| 1980 | Chevrolet | Camaro | Base |
| 1980-1981 | Chevrolet | Camaro | Berlinetta |
| 1980 | Chevrolet | Camaro | Rally Sport |
| 1981-1983 | Chevrolet | Camaro | Sport |
| 1980-1984 | Chevrolet | Caprice | Classic |
| 1981-1982 | Chevrolet | Caprice | Classic Estate |
| 1980-1981 | Chevrolet | Caprice | Classic Landau |
| 1980 | Chevrolet | Caprice | Classic Sport |
| 1982-1983 | Chevrolet | Celebrity | Base |
| 1982-1983 | Chevrolet | Celebrity | CL |
| 1982 | Chevrolet | Celebrity | CS |
| 1980-1983 | Chevrolet | Citation | Base |
| 1980 | Chevrolet | Citation | Club |
| 1980 | Chevrolet | Citation | Custom |
| 1980-1983 | Chevrolet | Citation | X-11 |
| 1978-1984 | Chevrolet | El Camino | Base |
| 1978,1981-1984 | Chevrolet | El Camino | Conquista |
| 1979-1981 | Chevrolet | El Camino | Royal Knight |
| 1980-1984 | Chevrolet | El Camino | SS |
| 1980-1984 | Chevrolet | Impala | Base |
| 1981-1982 | Chevrolet | Impala | Estate |
| 1980 | Chevrolet | Impala | Sport |
| 1978-1981 | Chevrolet | Malibu | Base |
| 1978-1983 | Chevrolet | Malibu | Classic |
| 1979-1980 | Chevrolet | Malibu | Classic Estate |
| 1978-1981 | Chevrolet | Malibu | Classic Landau |
| 1979-1980 | Chevrolet | Malibu | Classic Sport |
| 1979-1980 | Chevrolet | Malibu | Estate |
| 1979 | Chevrolet | Malibu | Landau |
| 1979 | Chevrolet | Malibu | Police |
| 1979-1980 | Chevrolet | Malibu | Sport |
| 1979,1981-1984 | Chevrolet | Monte Carlo | Base |
| 1983 | Chevrolet | Monte Carlo | CL |
| 1978-1981 | Chevrolet | Monte Carlo | Landau |
| 1978,1980 | Chevrolet | Monte Carlo | Sport |
| 1975,1978-1980 | Chevrolet | Monza | 2+2 |
| 1978-1980 | Chevrolet | Monza | 2+2 Sport |
| 1978-1980 | Chevrolet | Monza | 2+2 Spyder |
| 1978-1980 | Chevrolet | Monza | Base |
| 1975,1978-1979 | Chevrolet | Monza | S |
| 1978 | Chevrolet | Monza | Sport |
| 1980 | Chevrolet | Monza | Spyder |
| 1970 | Chevrolet | Nova | Base |
| 1985 | Excalibur | Phaeton | Anniversary |
| 1971-1984,1986-1989 | Excalibur | Phaeton | Base |
| 1989-1993 | Ford | Bronco | Custom |
| 1989-1996 | Ford | Bronco | Eddie Bauer |
| 1990-1996 | Ford | Bronco | XL |
| 1989-1992,1994-1996 | Ford | Bronco | XLT |
| 1993 | Ford | Bronco | XLT Lariat |
| 1992 | Ford | Bronco | XLT Nite |
| 1995-1996 | Ford | Bronco | XLT Sport |
| 1977 | Ford | Custom 500 | Base |
| 1977 | Ford | Custom 500 | Ranch Wagon |
| 1992-1996 | Ford | E-150 Econoline | Base |
| 1989-1991 | Ford | E-150 Econoline | Custom |
| 1989-1996 | Ford | E-150 Econoline | XL |
| 1986 | Ford | E-150 Econoline Club Wagon | Base |
| 1992-1996 | Ford | E-150 Econoline Club Wagon | Chateau |
| 1987-1996 | Ford | E-150 Econoline Club Wagon | Custom |
| 1986-1991 | Ford | E-150 Econoline Club Wagon | XL |
| 1986-1996 | Ford | E-150 Econoline Club Wagon | XLT |
| 1989-1991 | Ford | E-250 Econoline | Custom |
| 1989-1991 | Ford | E-250 Econoline | XL |
| 1989-1992 | Ford | F-150 | Custom |
| 1995-1996 | Ford | F-150 | Eddie Bauer |
| 1995-1996 | Ford | F-150 | Special |
| 1989-1996 | Ford | F-150 | XL |
| 1993-1996 | Ford | F-150 | XLT |
| 1989-1992 | Ford | F-150 | XLT Lariat |
| 1989-1992 | Ford | F-250 | Custom |
| 1995-1996 | Ford | F-250 | Eddie Bauer |
| 1995-1996 | Ford | F-250 | Special |
| 1989-1996 | Ford | F-250 | XL |
| 1993-1996 | Ford | F-250 | XLT |
| 1989-1992 | Ford | F-250 | XLT Lariat |
| 1978-1982 | Ford | Fairmont | Base |
| 1978-1982 | Ford | Fairmont | Futura |
| 1981 | Ford | Fairmont | S |
| 1977-1980 | Ford | Granada | Base |
| 1978-1980 | Ford | Granada | ESS |
| 1977-1980 | Ford | Granada | Ghia |
| 1981 | Ford | Granada | GL |
| 1981 | Ford | Granada | GLX |
| 1981 | Ford | Granada | L |
| 1977-1982 | Ford | LTD | Base |
| 1977-1985 | Ford | LTD | Country Squire |
| 1980-1985 | Ford | LTD | Crown Victoria |
| 1977-1979 | Ford | LTD | Landau |
| 1985 | Ford | LTD | LX Brougham |
| 1980-1982 | Ford | LTD | S |
| 1977-1979 | Ford | LTD II | Base |
| 1977-1978 | Ford | LTD II | Brougham |
| 1979 | Ford | LTD II | Landau |
| 1977-1979 | Ford | LTD II | S |
| 1977 | Ford | LTD II | Squire |
| 1977 | Ford | Maverick | Base |
| 1977 | Ford | Maverick | Grabber |
| 1979-1981 | Ford | Mustang | Base |
| 1981 | Ford | Mustang | Cobra |
| 1979-1981 | Ford | Mustang | Ghia |
| 1982 | Ford | Mustang | GL |
| 1982 | Ford | Mustang | GLX |
| 1982,1984-1985,1987-1995 | Ford | Mustang | GT |
| 1984 | Ford | Mustang | GT-350 20th Anniversary |
| 1995 | Ford | Mustang | GTS |
| 1982,1984 | Ford | Mustang | L |
| 1984,1987-1993 | Ford | Mustang | LX |
| 1977-1978 | Ford | Mustang II | Base |
| 1977-1978 | Ford | Mustang II | Ghia |
| 1977-1978 | Ford | Mustang II | Mach 1 |
| 1976 | Ford | P-400 | Base |
| 1976 | Ford | P-400 | Custom |
| 1976-1977 | Ford | P-500 | Base |
| 1976-1977 | Ford | P-500 | Custom |
| 1975-1979 | Ford | Ranchero | 500 |
| 1975-1979 | Ford | Ranchero | GT |
| 1975-1979 | Ford | Ranchero | Squire |
| 1974,1977-1982,1984-1985,1991-1992 | Ford | Thunderbird | Base |
| 1978 | Ford | Thunderbird | Diamond Jubilee |
| 1984-1985 | Ford | Thunderbird | Elan |
| 1984-1985 | Ford | Thunderbird | Fila |
| 1979,1981-1982 | Ford | Thunderbird | Heritage |