# NGK Iridium IX Spark Plug Box of 4 (XR5IX) 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 1965-1966 Buick Electra Base 1966 Buick Electra Custom 1966 Buick Gran Sport Base 1964,1966-1967 Buick LeSabre Base 1966-1967 Buick LeSabre Custom 1963-1966 Buick Riviera Base 1965-1966 Buick Riviera Gran Sport 1951 Buick Roadmaster Base 1964-1967 Buick Skylark Base 1964-1967 Buick Special Base 1964-1967 Buick Special Deluxe 1964 Buick Sportwagon Base 1964-1966 Buick Wildcat Base 1965-1966 Buick Wildcat Custom 1965 Buick Wildcat Deluxe 1966 Buick Wildcat Gran Sport 1965-1966 Cadillac Calais Base 1953-1956,1958-1966 Cadillac DeVille Base 1953-1966 Cadillac Eldorado Base 1963-1964 Cadillac Eldorado Biarritz 1957,1959-1960 Cadillac Eldorado Brougham 1965-1966 Cadillac Fleetwood 60 Special 1965-1966 Cadillac Fleetwood 75 1966 Cadillac Fleetwood Brougham 1953-1964 Cadillac Series 60 Fleetwood Base 1953-1964 Cadillac Series 62 Base 1958 Cadillac Series 70 Fleetwood Eldorado Brougham 1953-1964 Cadillac Series 75 Fleetwood Base 1968-1970 Checker Marathon Base 1970 Checker Marathon Deluxe 1968 Checker Marathon Town Custom 1969-1970 Chevrolet Bel Air Base 1969-1970 Chevrolet Biscayne Base 1969-1970 Chevrolet Brookwood Base 1968 Chevrolet C10 Pickup Base 1968 Chevrolet C10 Suburban Base 1968 Chevrolet C20 Pickup Base 1968 Chevrolet C20 Suburban Base 1968 Chevrolet C30 Pickup Base 1967,1969-1970 Chevrolet Camaro Base 1967,1969-1970 Chevrolet Camaro RS 1967-1970 Chevrolet Camaro SS 1967-1968,1970 Chevrolet Camaro Z28 1969-1970 Chevrolet Caprice Base 1969 Chevrolet Chevelle 300 Deluxe 1970 Chevrolet Chevelle Base 1969-1970 Chevrolet Chevelle Concours 1969-1970 Chevrolet Chevelle Concours Estate 1969-1970 Chevrolet Chevelle Greenbrier 1969-1970 Chevrolet Chevelle Malibu 1969-1970 Chevrolet Chevelle Nomad 1969-1970 Chevrolet Chevelle SS 396 1965-1967 Chevrolet Chevy II Base 1965-1968 Chevrolet Chevy II Nova 1967 Chevrolet Chevy II Nova SS 1962-1967,1969-1970 Chevrolet Corvette Base 1968 Chevrolet G10 Van Sportvan 1968 Chevrolet G20 Van Base 1968 Chevrolet G20 Van Sportvan 1963,1969-1970 Chevrolet Impala Base 1964-1967 Chevrolet Impala SS 1968 Chevrolet K10 Pickup Base 1968 Chevrolet K10 Suburban Base 1968 Chevrolet K20 Pickup Base 1968 Chevrolet K20 Suburban Base 1968 Chevrolet K30 Pickup Base 1969-1970 Chevrolet Kingswood Base 1969-1970 Chevrolet Kingswood Estate 1970 Chevrolet Monte Carlo Base 1970 Chevrolet Nova Base 1968 Chevrolet P20 Van Base 1968 Chevrolet P30 Van Base 1969-1970 Chevrolet Townsman Base 1959-1971 Chrysler 300 Base 1962-1963 Chrysler 300 Sport 1975-1976 Chrysler Cordoba Base 1973-1974 Chrysler New Yorker Base 1973-1974 Chrysler New Yorker Brougham 1965-1966 Chrysler Newport Base 1963-1966,1970-1971,1973-1974,1976-1977 Chrysler Town & Country Base 1965 Dodge 880 Base 1964-1965 Dodge 880 Custom 1974 Dodge B100 Van Base 1974 Dodge B100 Van Sportsman 1975-1978 Dodge B200 Base 1974 Dodge B200 Van Maxi 1974 Dodge B200 Van Maxi Wagon 1974 Dodge B200 Van Sportsman 1975-1978 Dodge B300 Base 1976-1979 Dodge CB300 Base 1970-1971 Dodge Challenger Base 1970-1971 Dodge Challenger R/T 1969-1971 Dodge Charger 500 1967-1974,1976 Dodge Charger Base 1969 Dodge Charger Daytona 1967-1971 Dodge Charger R/T 1969 Dodge Charger SE 1971-1978 Dodge Charger Special Edition 1976 Dodge Charger Sport 1971 Dodge Charger Super Bee 1965-1970 Dodge Coronet 440 1965-1970 Dodge Coronet 500 1965-1966,1970-1976 Dodge Coronet Base 1971,1976 Dodge Coronet Brougham 1971-1974,1976 Dodge Coronet Crestwood 1971-1975 Dodge Coronet Custom 1966-1970 Dodge Coronet Deluxe 1967-1970 Dodge Coronet R/T 1968-1970 Dodge Coronet Super Bee 1975-1978 Dodge D100 Custom 1976-1978 Dodge D100 Warlock 1973-1974 Dodge D100 Pickup Base 1977-1978 Dodge D150 Base 1977-1978 Dodge D200 Base 1975-1976 Dodge D200 Custom 1973-1974 Dodge D200 Pickup Base 1977-1978 Dodge D300 Base 1975-1976 Dodge D300 Custom 1973-1974 Dodge D300 Pickup Base 1968 Dodge Dart 270 1962 Dodge Dart 330 1962 Dodge Dart 440 1968-1969 Dodge Dart Base 1969 Dodge Dart Custom 1968-1969 Dodge Dart GT 1968-1969 Dodge Dart GTS 1961 Dodge Dart Phoenix 1961 Dodge Dart Pioneer 1969 Dodge Dart Swinger 1961 Dodge Lancer 170 1978 Dodge Magnum XE 1968 Dodge Monaco 500 1965,1968-1978 Dodge Monaco Base 1974,1977-1978 Dodge Monaco Brougham 1974 Dodge Monaco Custom 1975-1976 Dodge Monaco Royal 1975-1976 Dodge Monaco Royal Brougham 1968 Dodge Polara 500 1960-1962,1964-1968,1972-1973 Dodge Polara Base 1972-1973 Dodge Polara Custom 1974-1978 Dodge Ramcharger Base 1975-1978 Dodge Ramcharger SE 1975-1977 Dodge Royal Monaco Base 1975-1977 Dodge Royal Monaco Brougham 1975-1977 Dodge W100 Custom 1974 Dodge W100 Pickup Base 1960-1966 Dodge W100 Series Base 1977-1978 Dodge W150 Base 1975-1978 Dodge W200 Base 1974 Dodge W200 Pickup Base 1960-1966 Dodge W200 Series Base 1977-1978 Dodge W300 Base 1975-1976 Dodge W300 Custom 1960-1966 Dodge W300 Series Base 1960-1962 Dodge Wm300 Power Wagon Base 1965-1970 Excalibur Phaeton Base 1968 GMC C15/C1500 Pickup Base 1968 GMC C15/C1500 Suburban Base 1968 GMC C25/C2500 Pickup Base 1968 GMC C25/C2500 Suburban Base 1968 GMC C35/C3500 Pickup Base 1968 GMC G15/G1500 Van Rally 1968 GMC G15/G1500 Van Vandura 1968 GMC G25/G2500 Van Rally 1968 GMC G25/G2500 Van Vandura 1968 GMC K15/K1500 Pickup Base 1968 GMC K15/K1500 Suburban Base 1968 GMC K25/K2500 Pickup Base 1968 GMC K25/K2500 Suburban Base 1968 GMC K35/K3500 Pickup Base 1968 GMC P25/P2500 Van Base 1968 GMC P35/P3500 Van Base 1974 International 100 Base 1974 International 100 Travelall 1968 International 1000C Base 1968 International 1000C Travelall 1969-1970 International 1000D Base 1972-1973 International 1010 Base 1972-1973 International 1010 Travelall 1968 International 1100C Base 1968 International 1100C Travelall Custom 1969-1970 International 1100D Base 1969-1970 International 1100D Travelall Custom 1972-1973 International 1110 Base 1973 International 1110 Travelall 1968 International 1200C Base 1969-1970 International 1200D Base 1969-1970 International 1200D Travelall Custom 1972-1973 International 1210 Base 1973 International 1210 Travelall 1968 International 1300C Base 1969-1970 International 1300D Base 1971-1973 International 1310 Base 1975 International 150 Base 1974-1975 International 200 Base 1974 International 200 Travelall 1969 International 908C Base 1961-1964 International M Series Van Base 1968-1972 International M1100 Base 1968-1972 International M1200 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-xr5ix) > Updated: 2026-06-27