# NGK Iridium IX Spark Plug Box of 4 (WR5IX) 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. - RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs - Trivalent metal plating for superior anti-corrosion and anti-seizing properties - Outstanding acceleration, high fuel efficiency and durability - Fine iridium tip ensures durable and consistent spark This Part Fits: Year Make Model Submodel 1994 Dodge Ram 3500 Base 1966-1974 Ford Bronco Base 1980-1986 Ford Bronco Custom 1985-1986 Ford Bronco Eddie Bauer 1980-1981 Ford Bronco Ranger XLT 1968-1969 Ford Bronco Roadster 1968-1973 Ford Bronco Wagon 1982-1983 Ford Bronco XLS 1984-1986 Ford Bronco XLT 1982-1983 Ford Bronco XLT Lariat 1955-1959 Ford Club Base 1962-1965,1967 Ford Club Wagon Base 1967 Ford Club Wagon Custom 1963,1967 Ford Club Wagon Deluxe 1955-1974 Ford Country Sedan Base 1955-1974 Ford Country Squire Base 1955-1960 Ford Courier Sedan Delivery Base 1957,1964-1972 Ford Custom Base 1958-1960 Ford Custom 300 Base 1964-1974 Ford Custom 500 Base 1955-1956 Ford Customline Base 1957-1958 Ford Del Rio Wagon Base 1969-1982 Ford E-100 Econoline Base 1975-1982 Ford E-100 Econoline Chateau 1969-1974 Ford E-100 Econoline Club Wagon 1975-1983 Ford E-100 Econoline Custom 1975-1978 Ford E-100 Econoline Northland 1983 Ford E-100 Econoline XL 1975-1982 Ford E-100 Econoline Club Wagon Base 1975-1982 Ford E-100 Econoline Club Wagon Chateau 1975-1983 Ford E-100 Econoline Club Wagon Custom 1975-1978 Ford E-100 Econoline Club Wagon Northland 1983 Ford E-100 Econoline Club Wagon XL 1975-1982,1984-1986 Ford E-150 Econoline Base 1975-1982 Ford E-150 Econoline Chateau 1975-1983 Ford E-150 Econoline Custom 1975-1978 Ford E-150 Econoline Northland 1983-1986 Ford E-150 Econoline XL 1975-1982,1984-1986 Ford E-150 Econoline Club Wagon Base 1975-1982 Ford E-150 Econoline Club Wagon Chateau 1975-1983 Ford E-150 Econoline Club Wagon Custom 1975-1978 Ford E-150 Econoline Club Wagon Northland 1983-1986 Ford E-150 Econoline Club Wagon XL 1984-1986 Ford E-150 Econoline Club Wagon XLT 1969-1974 Ford E-200 Econoline Base 1971-1972 Ford E-200 Econoline Chateau Wagon 1969-1974 Ford E-200 Econoline Club Wagon 1970-1974 Ford E-200 Econoline Custom Wagon 1975-1982,1984-1986 Ford E-250 Econoline Base 1975-1982 Ford E-250 Econoline Chateau 1975-1983 Ford E-250 Econoline Custom 1975-1978 Ford E-250 Econoline Northland 1983-1986 Ford E-250 Econoline XL 1977-1980,1984-1986 Ford E-250 Econoline Club Wagon Base 1977-1980 Ford E-250 Econoline Club Wagon Chateau 1977-1980,1983 Ford E-250 Econoline Club Wagon Custom 1977-1978 Ford E-250 Econoline Club Wagon Northland 1983-1986 Ford E-250 Econoline Club Wagon XL 1984-1986 Ford E-250 Econoline Club Wagon XLT 1969-1974 Ford E-300 Econoline Base 1970-1974 Ford E-300 Econoline Chateau Wagon 1969-1974 Ford E-300 Econoline Club Wagon 1971-1972 Ford E-300 Econoline Custom Wagon 1975-1982,1984-1986 Ford E-350 Econoline Base 1975-1982 Ford E-350 Econoline Chateau 1975-1983 Ford E-350 Econoline Custom 1975-1978 Ford E-350 Econoline Northland 1983-1986 Ford E-350 Econoline XL 1977-1982,1984-1986 Ford E-350 Econoline Club Wagon Base 1977-1982 Ford E-350 Econoline Club Wagon Chateau 1977-1983 Ford E-350 Econoline Club Wagon Custom 1977-1978 Ford E-350 Econoline Club Wagon Northland 1983-1986 Ford E-350 Econoline Club Wagon XL 1984-1986 Ford E-350 Econoline Club Wagon XLT 1961-1967 Ford Econoline Base 1961-1974,1976-1978,1983 Ford F-100 Base 1975-1982 Ford F-100 Custom 1975-1978 Ford F-100 Northland 1975-1981 Ford F-100 Ranger 1978-1981 Ford F-100 Ranger Lariat 1975-1981 Ford F-100 Ranger XLT 1982-1983 Ford F-100 XL 1982-1983 Ford F-100 XLS 1977 Ford F-100 XLT 1982-1983 Ford F-100 XLT Lariat 1976-1978,1983-1986 Ford F-150 Base 1975-1982 Ford F-150 Custom 1975-1978 Ford F-150 Northland 1975-1981 Ford F-150 Ranger 1978-1981 Ford F-150 Ranger Lariat 1975-1981 Ford F-150 Ranger XLT 1982-1986 Ford F-150 XL 1982-1983 Ford F-150 XLS 1977,1983-1984 Ford F-150 XLT 1982,1985-1986 Ford F-150 XLT Lariat 1961-1974,1976-1978,1983-1986 Ford F-250 Base 1975-1982 Ford F-250 Custom 1975-1978 Ford F-250 Northland 1975-1981 Ford F-250 Ranger 1978-1981 Ford F-250 Ranger Lariat 1975-1981 Ford F-250 Ranger XLT 1982-1986 Ford F-250 XL 1982-1983 Ford F-250 XLS 1977,1983-1984 Ford F-250 XLT 1982,1985-1986 Ford F-250 XLT Lariat 1961-1974,1976-1978,1983-1986 Ford F-350 Base 1975-1982 Ford F-350 Custom 1975-1978 Ford F-350 Northland 1975-1981 Ford F-350 Ranger 1978-1981 Ford F-350 Ranger Lariat 1975-1981 Ford F-350 Ranger XLT 1982-1986 Ford F-350 XL 1982-1983 Ford F-350 XLS 1977,1983-1984 Ford F-350 XLT 1982,1985-1986 Ford F-350 XLT Lariat 1975-1977 Ford F-500 Custom 1957-1962,1964-1970 Ford Fairlane 500 1966-1967 Ford Fairlane 500XL 1955-1969 Ford Fairlane Base 1978-1982 Ford Fairmont Base 1978-1983 Ford Fairmont Futura 1981,1983 Ford Fairmont S 1960-1970 Ford Falcon Base 1962 Ford Falcon Deluxe 1963-1970 Ford Falcon Futura 1963-1965 Ford Falcon Futura Sprint 1961-1965 Ford Falcon Sedan Delivery Base 1959-1967 Ford Galaxie Base 1961 Ford Galaxie Club Victoria 1960 Ford Galaxie Special 1961 Ford Galaxie Starliner 1961 Ford Galaxie Sunliner 1961 Ford Galaxie Town Victoria 1968-1974 Ford Galaxie 500 Base 1968-1970 Ford Galaxie 500 XL 1972-1974 Ford Gran Torino Base 1973-1974 Ford Gran Torino Brougham 1974 Ford Gran Torino Elite 1972-1974 Ford Gran Torino Sport 1972-1974 Ford Gran Torino Squire 1975-1980 Ford Granada Base 1978-1980 Ford Granada ESS 1975-1980 Ford Granada Ghia 1981-1982 Ford Granada GL 1981-1982 Ford Granada GLX 1981-1982 Ford Granada L 1965-1974,1983 Ford LTD Base 1970-1974,1983 Ford LTD Brougham 1971,1973 Ford M-400 Base 1974 Ford M-450 Base 1955-1956 Ford Mainline Base 1970-1977 Ford Maverick Base 1975-1977 Ford Maverick Grabber 1964-1973,1979-1981 Ford Mustang Base 1970-1971 Ford Mustang Boss 302 1979-1981 Ford Mustang Ghia 1982 Ford Mustang GL 1982 Ford Mustang GLX 1970-1973 Ford Mustang Grande 1982 Ford Mustang L 1970-1973 Ford Mustang Mach 1 1965-1970 Ford Mustang Shelby GT-350 1966 Ford Mustang Shelby GT-350H 1968-1970 Ford Mustang Shelby GT-500 1968 Ford Mustang Shelby GT-500KR 1965-1966 Ford P-100 Base 1965-1974,1976 Ford P-350 Base 1975 Ford P-350 Custom 1975-1976 Ford P-400 Base 1975-1976 Ford P-400 Custom 1975-1977 Ford P-500 Base 1975-1977 Ford P-500 Custom 1956 Ford Park Lane Wagon Base 1971-1974 Ford Pinto Base 1955-1974 Ford Ranch Wagon Base 1970 Ford Ranch Wagon Police Cruiser 1967-1974 Ford Ranchero 500 1967 Ford Ranchero 500 XL 1957-1971 Ford Ranchero Base 1966 Ford Ranchero Custom 1968-1974 Ford Ranchero GT 1970-1974 Ford Ranchero Squire 1955-1959 Ford Skyliner Base 1963-1964 Ford Sprint Base 1960 Ford Starliner Base 1955-1960 Ford Sunliner Base 1955-1973,1980-1982 Ford Thunderbird Base 1981-1982 Ford Thunderbird Heritage 1980 Ford Thunderbird Silver Anniversary 1980-1982 Ford Thunderbird Town Landau 1971 Ford Torino 500 1968-1974 Ford Torino Base 1970-1971 Ford Torino Brougham 1969-1971 Ford Torino Cobra 1968-1971 Ford Torino GT 1969-1971 Ford Torino Squire 1970-1971 Ford Torino Super Cobra Jet 1955-1960 Ford Victoria Base 1952-1959 Lincoln Capri Base 1958-1972 Lincoln Continental Base ## Details - **Price:** 74.61 CAD - **Vendor:** NGK - **Type:** Spark Plugs ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 74.61 CAD | In stock | ## Images - Photo - Primary - Photo - Primary - Photo - out of package - Photo - out of package --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/ngk-iridium-ix-spark-plug-box-of-4-wr5ix) > Updated: 2026-06-27