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NGK 6637
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:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1967 | Alfa Romeo | 2600 | Berlina |
| 1967 | Alfa Romeo | 2600 | SZ |
| 1975-1977 | Alfa Romeo | Alfetta | GT |
| 1975-1977 | Alfa Romeo | Alfetta | Sport |
| 1981-1986 | Alfa Romeo | GTV-6 | 2.5 |
| 1987-1989 | Alfa Romeo | Milano | Gold |
| 1987-1989 | Alfa Romeo | Milano | Platinum |
| 1987 | Alfa Romeo | Milano | Silver |
| 1971-1975 | Alfa Romeo | Montreal | Base |
| 1978-1979 | Alfa Romeo | Sport | Base |
| 1977-1979 | Alfa Romeo | Sprint | Veloce |
| 2007-2008 | Arctic Cat | AC 120 Sno Pro | Base |
| 2006 | Arctic Cat | F120 | Base |
| 2020 | Arctic Cat | Prowler Pro | Base |
| 2020 | Arctic Cat | Prowler Pro Crew | Base |
| 2000-2001 | Arctic Cat | Z 120 | Base |
| 2001 | Arctic Cat | Z 120 Sno Pro | Base |
| 2002-2005 | Arctic Cat | ZR 120 | Base |
| 1958-1963 | Aston Martin | DB4 | Base |
| 1960-1963 | Aston Martin | DB4 | GT |
| 1962-1963 | Aston Martin | DB4 | Vantage |
| 1960-1963 | Aston Martin | DB4 | Zagato |
| 1963-1965 | Aston Martin | DB5 | Base |
| 1965 | Aston Martin | DB5 | Radford |
| 1964-1965 | Aston Martin | DB5 | Vantage |
| 1965 | Aston Martin | DB5 | Volante |
| 1965-1970 | Aston Martin | DB6 | Base |
| 1965-1970 | Aston Martin | DB6 | Radford |
| 1965-1969 | Aston Martin | DB6 | Vantage |
| 1965-1970 | Aston Martin | DB6 | Volante |
| 1967-1971 | Aston Martin | DBS | Base |
| 1970 | Aston Martin | DBS | V-8 |
| 1967-1971 | Aston Martin | DBS | Vantage |
| 1977-1978 | Aston Martin | Lagonda | Base |
| 1972-1978 | Aston Martin | V-8 | Base |
| 1977-1978,1982 | Aston Martin | V-8 | Vantage |
| 1978,1982 | Aston Martin | V-8 | Volante |
| 1972-1974 | Aston Martin | Vantage | Base |
| 1969-1971 | Audi | 100 Series | LS |
| 1980-1983 | Audi | 4000 | Base |
| 1982-1983 | Audi | 4000 | GT |
| 1982-1983 | Audi | 4000 | S |
| 1986-1987 | Audi | 4000 Quattro | CS |
| 1978-1983 | Audi | 5000 | Base |
| 1986-1988 | Audi | 5000 | CS |
| 1979-1983,1985-1987 | Audi | 5000 | S |
| 1980-1983 | Audi | 5000 | S Turbo |
| 1986 | Audi | 5000 Quattro | CS |
| 1981-1985 | Audi | Coupe | Base |
| 1986-1987 | Audi | Coupe | GT |
| 1969-1972 | Audi | Super 90 | Base |
| 1968-1972 | Austin | America | Base |
| 1973-1975 | Austin | Marina | Base |
| 1973-1975 | Austin | Marina | GT |
| 1960-1966 | Austin | Mini | Base |
| 1960-1966 | Austin | Mini 850 | Base |
| 1962-1969 | Austin | Mini Cooper | Base |
| 1964-1965 | Austin | Mini Cooper | S |
| 1959-1967 | Austin Healey | 3000 | Base |
| 1962-1967 | Austin Healey | Sprite | Base |
| 1968-1970 | Austin Healey | Sprite | MK IV |
| 1984-1989 | Bertone | X-1/9 | Base |
| 1964-1971 | BMW | 1600 | Base |
| 1968-1971 | BMW | 1600 | Cabriolet |
| 1971 | BMW | 1600 | Touring |
| 1966-1971 | BMW | 1600-2 | Base |
| 1966-1968 | BMW | 1600ti | Base |
| 1967-1971 | BMW | 1602 | Base |
| 1968-1971 | BMW | 1800 | Base |
| 1971 | BMW | 1800 | Touring |
| 1971 | BMW | 1802 | Base |
| 1966-1972 | BMW | 2000 | Base |
| 1971-1972 | BMW | 2000 | Touring |
| 1968-1969 | BMW | 2000c | Base |
| 1968-1969 | BMW | 2000cs | Base |
| 1968-1971 | BMW | 2000ti | Base |
| 1968-1971 | BMW | 2000ti | Lux |
| 1969-1972 | BMW | 2000tii | Base |
| 1971-1972 | BMW | 2000tii | Touring |
| 1966-1976 | BMW | 2002 | Base |
| 1971-1974 | BMW | 2002 | Cabriolet |
| 1973-1974 | BMW | 2002 | Turbo |
| 1968-1971 | BMW | 2002ti | Base |
| 1971-1974 | BMW | 2002tii | Base |
| 1968-1971 | BMW | 2800CS | Base |
| 1983-1984,1991 | BMW | R100 | Base |
| 1976-1978 | BMW | R100/7 | Base |
| 1980-1984 | BMW | R100CS | Base |
| 1987-1995 | BMW | R100GS | Base |
| 1994-1995 | BMW | R100GS Paris-Dakar | Base |
| 1992-1995 | BMW | R100R | Base |
| 1988-1993 | BMW | R100RS | Base |
| 1988-1995 | BMW | R100RT | Base |
| 1981-1984 | BMW | R100T | Base |
| 1969-1973 | BMW | R75/5 | Base |
| 1973-1976 | BMW | R75/6 | Base |
| 1976-1977 | BMW | R75/7 | Base |
| 1985-1987 | BMW | R80 | Base |
| 1976-1984 | BMW | R80/7 | Base |
| 1980-1986 | BMW | R80G/S | Base |
| 1992-1994 | BMW | R80R | Base |
| 1982-1987 | BMW | R80RT | Base |
| 1982-1984 | BMW | R80ST | Base |
| 1973-1976 | BMW | R90/6 | Base |
| 1973-1976 | BMW | R90S | Base |
| 1976-1979 | Buick | Opel | Base |
| 1977-1979 | Buick | Opel | Deluxe |
| 1978-1979 | Buick | Opel | Sport |
| 1971-1975 | Citroen | SM | Base |
| 1971-1980 | Dodge | Colt | Base |
| 1976-1977 | Dodge | Colt | Carousel |
| 1977-1980 | Dodge | Colt | Custom |
| 1973-1977 | Dodge | Colt | GT |
| 1990-1998 | Eagle | Talon | TSi |
| 1967-1975 | Fiat | 124 | Base |
| 1968-1981 | Fiat | 124 | Spider |
| 1971-1979 | Fiat | 128 | Base |
| 1976-1977 | Fiat | 128 | Custom |
| 1973-1975 | Fiat | 128 | SL |
| 1975-1978 | Fiat | 131 | Base |
| 1979-1981 | Fiat | Brava | Base |
| 1979-1982 | Fiat | Strada | Base |
| 1979-1982 | Fiat | Strada | Custom |
| 1974-1983 | Fiat | X-1/9 | Base |
| 2004-2005 | Gas Gas | Pampera 125 | Base |
| 2004-2005 | Gas Gas | Pampera 280 | Base |
| 2003-2005 | Gas Gas | Wild HP 240 | Base |
| 1969-1972 | Honda | 600 | Base |
| 1975-1979 | Honda | Civic | 1200 |
| 1973-1974 | Honda | Civic | Base |
| 1975 | Honda | Civic | CVCC |
| 1973-1974 | Jaguar | XJ12 | Base |
| 1975-1976 | Jaguar | XJ12 | C |
| 1975-1979 | Jaguar | XJ12 | L |
| 1976,1979 | Jaguar | XJS | Base |
| 1971-1974 | Jaguar | XKE | Base |
| 1972-1975 | Jensen | Healey | Base |
| 1976 | Jensen | Healey | GT |
| 2005 | Kawasaki | KAF400 Mule 610 4x4 | Base |
| 1979-1982 | Kawasaki | KZ1300 | Base |
| 1980 | Kawasaki | KZ1300B | Base |
| 1983-1988 | Kawasaki | ZN1300 Voyager | Base |
| 1976-1979,1981 | Lancia | Beta | Base |
| 1976-1979 | Lancia | Beta | HPE |
| 1979,1981-1982 | Lancia | Zagato | Base |
| 1998 | Land Rover | Discovery | 50th Anniversary Edition |
| 1994-1995 | Land Rover | Discovery | Base |
| 1998 | Land Rover | Discovery | LE |
| 1997-1998 | Land Rover | Discovery | LSE |
| 1996-1997,1999 | Land Rover | Discovery | SD |
| 1996-1997 | Land Rover | Discovery | SE |
| 1996-1997 | Land Rover | Discovery | SE7 |
| 1997 | Land Rover | Discovery | XD |
| 1976-1979 | Lotus | Eclat | Base |
| 1976-1979 | Lotus | Eclat | Sprint |
| 1958-1966 | Lotus | Elite | Base |
| 1960-1961 | Lotus | Elite | S2 |
| 1976-1979,1983-1984,1988 | Lotus | Esprit | Base |
| 1985-1987 | Lotus | Esprit | S3 |
| 1994-1995 | Lotus | Esprit | S4 |
| 1995 | Lotus | Esprit | S4s |
| 1982-1988 | Lotus | Esprit | Turbo |
| 1992-1993 | Lotus | Esprit | Turbo SE |
| 1962-1975 | Lotus | Seven | Base |
| 1962-1968 | Lotus | Super Seven | Base |
| 1971-1983 | Maserati | Bora | Base |
| 1967-1973 | Maserati | Ghibli | Base |
| 1969-1974 | Maserati | Indy | Base |
| 1974-1979 | Maserati | Khamsin | Base |
| 1972-1979 | Maserati | Merak | Base |
| 1980-1982 | Maserati | Merak | SS |
| 1967-1971 | Maserati | Mexico | Base |
| 1968-1969,1979-1986 | Maserati | Quattroporte | Base |
| 1970-1971 | Mazda | 1800 | Base |
| 1970-1971 | Mazda | 616 | Base |
| 1972 | Mazda | 618 | Base |
| 1986-1987 | Mazda | 626 | GT |
| 1972-1977 | Mazda | 808 | Base |
| 1972-1976 | Mazda | B1600 | Base |
| 1977-1978 | Mazda | B1800 | Base |
| 1978 | Mazda | GLC | Base |
| 1977-1978 | Mazda | GLC | DX |
| 1977 | Mazda | GLC | LX |
| 1978 | Mazda | GLC | Sport |
| 1976-1977 | Mazda | Mizer | Base |
| 1966-1967 | Mercedes-Benz | 200 | Base |
| 1968-1973 | Mercedes-Benz | 220 | Base |
| 1966-1969 | Mercedes-Benz | 230 | Base |
| 1966-1967 | Mercedes-Benz | 230S | Base |
| 1963-1966 | Mercedes-Benz | 230SL | Base |
| 1968-1972 | Mercedes-Benz | 250 | Base |
| 1970-1972 | Mercedes-Benz | 250C | Base |
| 1966-1967 | Mercedes-Benz | 250S | Base |
| 1966-1967 | Mercedes-Benz | 250SE | Base |
| 1967 | Mercedes-Benz | 250SL | Base |
| 1973-1974 | Mercedes-Benz | 280 | Base |
| 1973-1974 | Mercedes-Benz | 280C | Base |
| 1968-1971 | Mercedes-Benz | 280S | Base |
| 1972-1973 | Mercedes-Benz | 280SE | 4.5 |
| 1968-1972 | Mercedes-Benz | 280SE | Base |
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NGK 6637 Specifications
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NGK 6637 Specifications
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Shipping to US addresses generally takes 2 to 4 business days to arrive depending on your location. We also offer Next Day Air and 2nd Day Air if you need it faster.
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NGK 6637 - Spark Plugs
NGK IX Iridium Spark Plug Box of 4 (BPR6EIX)
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NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency...
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