NGK 6664 - Alternative spark plugs

There are 31 replacement spark plugs for NGK 6664. The cross references are for general reference only, please check specifications for your application.

Compatible plug on Amazon

4 Pack NGK BR7EIX 6664 Iridium IX High Performance Spark Plugs M14 x 1.25 For Motorcycle ATV
4 Pack NGK BR7EIX 6664 Iridium IX High Performance Spark Plugs M14 x 1.25 For Motorcycle ATV
60.95$

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Specifications for NGK 6664

Thread diameter
14.0 mm
Thread reach
19 mm
Hex size
20.8 mm

NGK 6664 replacement spark plugs

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network and Amazon Associates.

Replacement spark plugs for NGK 6664 on Amazon

(8-Pack) NGK Spark Plugs BR7EIX (Stock # 6664)
(8-Pack) NGK Spark Plugs BR7EIX (Stock # 6664)
USD 78.99
NGK BR7EIX 6664 Iridium IX High Performance Spark Plug M14 x 1.25 For Motorcycle ATV Cruiser Dirt
NGK BR7EIX 6664 Iridium IX High Performance Spark Plug M14 x 1.25 For Motorcycle ATV Cruiser Dirt
USD 19.50
NGK BR7EIX 6664 Iridium IX High Performance Spark Plug M14 x 1.25 For Motorcycle ATV Cruiser Dirt
NGK BR7EIX 6664 Iridium IX High Performance Spark Plug M14 x 1.25 For Motorcycle ATV Cruiser Dirt
USD 19.50
NGK 6664 Iridium IX Spark Plugs BR7EIX (4 Pack)
NGK 6664 Iridium IX Spark Plugs BR7EIX (4 Pack)
USD 36.67
NGK BR7EIX 6664 Iridium IX High Performance Spark Plug M14 x 1.25 For Motorcycle ATV Cruiser Dirt
NGK BR7EIX 6664 Iridium IX High Performance Spark Plug M14 x 1.25 For Motorcycle ATV Cruiser Dirt
USD 19.50
NGK 6664-4PK BR7EIX Iridium IX Spark Plug, Pack of 4
NGK 6664-4PK BR7EIX Iridium IX Spark Plug, Pack of 4
USD 29.19
NGK BR7EIX 6664 Iridium IX High Performance Spark Plug M14 x 1.25 For Motorcycle ATV Cruiser Dirt
NGK BR7EIX 6664 Iridium IX High Performance Spark Plug M14 x 1.25 For Motorcycle ATV Cruiser Dirt
USD 19.50
4 Pack NGK BR7EIX 6664 Iridium IX High Performance Spark Plugs M14 x 1.25 For Motorcycle ATV
4 Pack NGK BR7EIX 6664 Iridium IX High Performance Spark Plugs M14 x 1.25 For Motorcycle ATV
USD 60.95
ATV&UTV Replace Parts & Accessories For Autolite Copper Spark Plug Each #4054 Mod-BBM45-FV4037
ATV&UTV Replace Parts & Accessories For Autolite Copper Spark Plug Each #4054 Mod-BBM45-FV4037
USD 29.88
6 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
6 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
USD 387.99
ATV&UTV Replace Parts & Accessories For Autolite Iridium Extreme Sport Spark Plug Each #XS4064 ATVs
ATV&UTV Replace Parts & Accessories For Autolite Iridium Extreme Sport Spark Plug Each #XS4064 ATVs
USD 42.63
4 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
4 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
USD 275.99
4 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
4 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
USD 275.99
6 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
6 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
USD 387.99
6 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
6 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
USD 387.99
4 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
4 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
USD 275.99
4 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
4 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
USD 275.99
6 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
6 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
USD 387.99
4 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
4 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
USD 275.99
6 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
6 Pack Replacement 6664 Iridium IX Spark Plug for Bosch W5CP W5CS for DENSO Auto 3095 W22ES-GU
USD 387.99

Applications for this plug

Make Model Engine Years Engine size HP kW Gap Notes
A.J 16 C 1959 - 1964 350 0.5
A.J 18 Statesman 1945 - 1966 500 0.5
A.J 31 1959 - 1966 650 0.5
A.J 33 1965 - 1968 750 0.5
A.J 33 CSR 1965 - 1968 750 0.5
ABARTH 850 OT, 1000 OT, 1000 OTS 0.7
ALFA ROMEO 164 12V 06410, 06412 06.1987 -09.1993 3 0.7
ALFA ROMEO 1900 Super Sprint, Super TI 1956 - 1958 1.9 0.7
ALFA ROMEO 1900 TI, 1900 C 1954 - 1955 1.9 0.7
ALFA ROMEO Alfa 90 i. Super AR016.46-019.11 cat 10.1984 -12.1990 2.5 150 110 0.7
ALFA ROMEO Giulia Spider Berline, (101.23) 1958 - 1962 1.6 0.7
ALFA ROMEO Giulietta Sprint 1956 - 1958 0.7
ALFA ROMEO GTV 2000 Typ105 1972 - 2 133 98 0.7
ALFA ROMEO Montreal V8 1970 - 1977 2.6 195 144 0.7
ALFA ROMEO Spider 1962 - 1966 1.6 90 66 0.7
ALFA ROMEO Spider / I / Q.V. AR005.15 04.1971 -12.1989 2 130 94 0.7
ALFA ROMEO Spider 1300 Junior 1.3 0.7
ALFA ROMEO Spider 1600 (Duetto) 0.536 06.1966 - 1967 1.6 109 80 0.7
ALFA ROMEO Spider 2.0 04.1971 -12.1989 2 133 98 0.7
ALFA ROMEO Sprint Veloce, Sprint Special 1958 - 0.7
ARIEL Arrow 200 1958 - 1965 200 0.8
ARIEL Arrow 250 1958 - 1965 250 0.8
AUDI 75 L 12.1968 - 1972 1.7 75 55 0.7
AUDI 80 / 80 L 09.1966 - 1968 1.7 80 59 0.7
AUDI Audi 60 02.1968 - 1972 1.5 54 40 0.7
AUDI Audi 72 09.1965 - 1968 1.7 72 53 0.7
B.S.A. A10 RGS 1957 - 1963 646 0.5
B.S.A. A10 RR 1957 - 1963 646 0.5
B.S.A. A10 SR 1957 - 1963 646 0.5
B.S.A. A50 1962 - 1970 498 0.5
B.S.A. A7 SS 1954 - 1962 500 0.5
B.S.A. B32 Alu Head 1946 - 1957 348 0.5
B.S.A. B40 SS90 1962 - 1965 350 0.5
B.S.A. B44 1966 - 1970 441 0.5
B.S.A. B50 Gold Star 1971 - 1973 499 0.5
B.S.A. B50 SS 1971 - 1973 499 0.5
B.S.A. B50 SS Gold Star 1971 - 1972 499 0.5
B.S.A. B50 T Victor 1971 - 1973 499 0.5
B.S.A. Bantam 175, Bushman 175 0.5
B.S.A. Bantam D10,14,14/4,14/5 175 0.5
B.S.A. D10 1966 - 1967 175 0.5
B.S.A. D14 Bantam 1968 - 1969 175 0.5
B.S.A. D175 Bantam 1969 - 1971 175 0.5
B.S.A. D175 Bushman 1969 - 1971 175 0.5
BENELLI 125-2C Twin 125 0.5
BENELLI 2C, 2CE, Sport Speciale 250 0.5
BENELLI Magnum 3V 50 0.5
BETA EVO 125 2T 2008 - 125 0.6
BETA EVO 200 2T 2008 - 200 0.6
BETA EVO 250 2T 2008 - 250 0.6
BETA EVO 290 2T 2008 - 290 0.6
BETA REV 3 (Italy) 125 0.6
BETA REV 3 O 200 0.6
BETA REV 3 O 270 0.6
BMW 2600 1962 - 1963 2.6 101 74 0.7
BMW 2600 L 1962 - 1963 2.6 110 81 0.7
BMW 3.2 ab Motornr. 30644 -1961 3.2 120 88 0.7
BMW 3.2 Super ab Motornr. 30644 -1961 3.2 140 103 0.7
BMW 3200 CS 1962 - 1965 3.2 0.7
BMW 3200 L 1961 - 3.2 140 103 0.7
BMW 3200 S 1961 - 1964 3.2 160 118 0.7
BMW 501/6 1956 - 1958 2.1 72 53 0.7
BMW 501/8 ab Motornr. 14074 -1961 2.6 101 74 0.7
BULTACO Sherpa S 200 0.5
CARABELA Coyote MX 100 0.6
CARABELA Coyote MX 125 0.6
CARABELA Marquesa Enduro 100 0.6
CARABELA Marquesa Mini MX 100 0.6
CARABELA Torero Flat Track 450 0.6
CPI Supercross 50 2003 - 50 0.8
CPI Supermoto 50 2003 - 50 0.8
FIAT 850 1964 - 1974 0.85 34 25 0.7
FIAT 850 Super 1964 - 1974 0.85 37 27 0.7
GILERA 125 GR1 1976 - 1981 125 0.5
GILERA 125 TG1 1976 - 1981 125 0.5
GILERA 50 TS 1979 - 1982 50 0.5
GILERA GR 2 (Export) 50 0.5
GILERA Jubilee 90 0.5
GILERA Touring 1973 - 1981 50 0.5
GILERA Trial 50 0.5
HARLEY-DAVIDSON SX 125 1974 - 1975 125 0.5
HERCULES ZX 1 50 0.5
KAWASAKI KD 80 1980 - 1981 80 0.7
KAWASAKI KE 175 1981 - 1981 175 0.8
KAWASAKI KH 80 1981 - 1982 80 0.8
KAWASAKI KL 250 1979 - 1983 250 0.8
KAWASAKI KLX 250 1980 - 1984 250 0.8
KAWASAKI LX 250 2009 - 2011 250 0.8
KAWASAKI Z 250 1980 - 1980 250 0.8
KAWASAKI Z 250 C 1980 - 1982 250 0.8
KAWASAKI Z 250 G 1980 - 1984 250 0.8
KAWASAKI Z 400 1976 - 1981 400 0.8
KAWASAKI Z 400 B 1978 - 1980 400 0.8
KAWASAKI Z 400 G 1979 - 1979 400 0.8
KAWASAKI Z 440 1980 - 1985 440 0.8
KAWASAKI Z 650 B 1977 - 1980 650 0.8
KAWASAKI Z 650 C 1977 - 1980 650 0.8
KAWASAKI Z 650 SR 1979 - 1980 650 0.8
KTM 250 EXC 2010 - 250 0.8
KTM 250 EXC (E-Starter) 2010 - 250 0.8
KTM 250 EXC Enduro Competition 2003 - 250 0.6
KTM 250 EXC Six Days 2010 - 250 0.8
KTM 250 MXC 2004 - 250 0.6
KTM 250 XC 2010 - 250 0.8
KTM 250 XC-W 2010 - 250 0.8
KTM 300 EXC 2010 - 300 0.8
KTM 300 EXC Enduro Competition 2003 - 300 0.6
KTM 300 EXC Sixt Days 2010 - 300 0.8
KTM 300 MXC 2003 - 300 0.6
KTM 300 XC 2010 - 300 0.8
KTM 300 XC-W 2010 - 300 0.8
LAMBRETTA 125,Lince,Linea,SX 125 0.5
LAMBRETTA 150 GP 150 0.5
LAMBRETTA 200 GP 200 0.5
LAMBRETTA 200,Jet,Lince,Mensa-Expres 200 0.5
LAMBRETTA Pony,SX 200 0.5
LAMBRETTA Spezial 150 150 0.5
LANCIA Flaminia 826 1963 - 1970 2.8 0.7
LANCIA Flaminia 826.03 1963 - 1967 2.8 0.7
LANCIA Flaminia 826.1 1963 - 1965 2.8 0.7
LANCIA Flaminia 826.2 1964 - 1967 2.8 0.7
LANCIA Flaminia Pinin Farina 823.02 1962 - 1963 2.5 0.7
LANCIA Flavia Berlina 1.5 1. Serie 815 1960 - 1963 1.5 0.7
LANCIA Fulvia Coup? Rallye 1.3 HF 1. Serie 818.342 1967 - 1969 1.3 0.7
MALAGUTI Dune Enduro 75 75 0.5
MALAGUTI RST 75 Turismo 75 0.5
MATCHLESS G12 1959 - 1966 650 0.5
MATCHLESS G3C 1960 - 1964 350 0.5
MATCHLESS G80 1945 - 1966 500 0.5
MINARELLI P4CS, CSA, P4R 50 0.5
MINARELLI P6CS, CSA, P6R 50 0.5
MINARELLI RV4,A 50 0.5
MONDIAL Spezial V4 Record 50 0.5
MONTESA Cota 172/200 175 0.5
MONTESA Cota 74 /74T /80 75 0.5
MONTESA Crono 350 350 0.5
MONTESA Crono 75 75 0.5
MONTESA Enduro 360 H6/H7/H7S/L 350 0.5
MONTESA Enduro 75 H6 /H7/ L 75 0.5
MOTO GUZZI Nibbio 1975 - 1976 50 0.5
MOTO GUZZI V 35 II 1980 - 1987 350 0.5
MOTO GUZZI V 35 Imola 1979 - 1987 350 0.5
MV AGUSTA 750 S American 750 0.5
NSU 1000 TT 09.1965 - 1967 1.1 55 40 0.7
NSU 1200C 09.1969 -11.1971 1.2 54 40 0.7
NSU Prinz 1000 1964 - 1967 1 43 32 0.7
NSU Prinz 30E 1959 - 1962 0.6 30 22 0.7
NSU Prinz 4 09.1961 - 1973 0.6 30 22 0.7
NSU Sport-Prinz Bertone 1959 - 1962 0.6 30 22 0.7
NSU Typ 110 09.1965 - 1967 1.1 53 39 0.7
OSSA 160 GT-T2 160 0.5
PANHARD 24B / 24C (service dur) M8N 1964 - 0.85 0.7
PANHARD 24BT / 24CT M8S 1964 - 0.85 0.7
PANHARD 24CT M10S 1965 - 0.85 0.7
PANHARD Dyna Z / D65/PL 17 (service dur) M5 0.85 42 31 0.7
PANHARD Dyna Z / PL 17 Tigre 0.85 50 37 0.7
PANHARD PL 17 Tigre B 1959 - 0.85 60 44 0.7
PANHARD PL 17 (service dur) M6 1959 - 0.85 50 37 0.7
RIEJU Drac/Water),RS-1,RV 50 50 0.5
SACHS W 2000 294 0.5
SACHS ZX 1 50 0.5
SUZUKI DS 80 1993 - 1994 80 0.7
SUZUKI GT 750 750 0.5
SUZUKI JR 80 K2 2002 - 80 0.8
SUZUKI TS 80 ERX 80 0.8
TRIUMPH Trophy TR6 Nr.029364 ?> 1955 - 1973 650 0.5
YAMAHA AG 100 F 3HA... 2007 - 2009 100 0.8
YAMAHA AG 100 H / E 100 0.8
YAMAHA AG 175 H 175 0.8
YAMAHA DT 100 100 0.8
YAMAHA DT 100 C 100 0.8
YAMAHA DT 100 X 100 0.8
YAMAHA MX 100 1979 - 100 0.8
YAMAHA MX 100 H 100 0.8
YAMAHA NR 200 200 0.8
YAMAHA RD 200 19,0mm 397 200 0.7
YAMAHA RS 195 195 0.8
YAMAHA RT 100 E / F 1993 - 100 0.8
YAMAHA TY 125 1K6 1977 - 1981 125 0.7
YAMAHA TY 175 175 0.8
YAMAHA TY 175 E 175 0.8
YAMAHA TY 175 J 175 0.8
YAMAHA TY 250 3BA 1988 - 1990 250 0.8
YAMAHA TY 250 S16 1975 - 1979 250 0.8
YAMAHA XJ 750 - 1983 750 0.7
YAMAHA XJ 750 RH 750 0.7
YAMAHA XS 750 1T5 1977 - 1979 750 0.7
YAMAHA XS 750 C 750 0.7
YAMAHA XS 750 D 750 0.7
YAMAHA XS 750 E 750 0.7
YAMAHA XS 750 S 750 0.7
YAMAHA XS 750 SE 750 0.7
YAMAHA XS 750 T 750 0.7
YAMAHA XTS 750 SE 750 0.7
YAMAHA XV 750 - 1983 750 0.7
YAMAHA XV 750 SE 5G5 1981 - 1982 750 0.7
ZUNDAPP KS 50 19.0 mm Gewindelange 50 0.5

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