NGK BKR7EIX Iridium Spark Plug Specifications Whatever your use or engine set-up the correct choice of spark plug is very important. Iridium is very heavy and dense metal ensuring that NGK spark plugs have a longer lifespan than OEM ones withstanding more than 100.000 km in standard use. Which heat range to choose ? If the letters (for example BKR-EIX) indicate the spark plug's shape and thread size the numbers (from 6 to 9) indicate the heat range basically meaning how well the spark plug can operate in intense conditions. The higher the number the more the spark plug will be cold and more adapted to tuned engines and sporty use. A cold spark plug is designed to operate at higher than average temperatures and disperse the heat inside the cylinders improving combustion performances and engine reliability reducing the risk of detonation. However make sure you only fit cold spark plugs if your car requires them otherwise you could encounter problems such as difficult cold starts and rough idling. Also do not install cold spark plugs if your engine runs on E85 fuel. In short : BKR6EIX : standard grade for standard engine and standard use or E85 fuel BKR7EIX : one grade colder than standard for lightly tuned or sporty engines used both on the road or the track BKR8EIX : two grades colder than standard for tuned and powerful engines used mainly on the track BKR9EIX : three grades colder than standard for high power and heavily modified engines used in intense conditions Please contact us to confirm compatibility with your vehicle. Application List Non-exhaustive list. Alfa Romeo GTA and other V6 Alpine A610 3.0L Turbo Aston Martin DB7 (AJ6HT) BMW 1-Series E8X : 116i 118i 120i (N45 N46) BMW 3-Series E30 : 316i 318i (M40 M42 M43) BMW 3-Series E36 : 316i 318i 320i 323i 325i 328i (M40 M42 M43 M50 M52) BMW 3-Series E46 : 316i 318i 320i 323i 325i 328i 330i (M43 N40 N42 N45 N46 M52 M54) BMW 3-Series E9X : 316i 318i 320i (N45 N46) BMW 5-Series E28 : 520i (M20) BMW 5-Series E34 : 518i 520i 525i 530i 540i (M40 M50 M60) BMW 5-Series E39 : 520i 523i 525i 528i 530i 535i 540i M5 (M52 M54 M62 S62) BMW 5-Series E6X : 520i 525i 530i 540i 545i 550i (N62 N73 M54) BMW 6-Series E6X : 645i 650i (N62 N73 M54) BMW 7-Series E32 : 730i 740i 750i (M60) BMW 7-Series E38 : 728i 730i 735i 740i (M52 M60 M62) BMW 7-Series E6X : 730i 735i 740i 745i 750i 760i (N62 N73 M54) BMW 8-Series E31 : 840i 850i (M60 M62 S70) BMW X1 E84 : 1.8i (N46) BMW X3 E83 : 2.0i 2.5i 3.0i (N46 M54) BMW X5 E53 : 3.0i 4.4i 4.6i 4.8i (N62 M62 M54) BMW X5 E70 : 4.8i (N62) BMW Z3 : 1.8i 1.9i 2.0i 2.2i 2.8i 3.0i (M43 M44 M52 M54) BMW Z4 E85 & E86 : 2.0i 2.2i 2.5i 3.0i (N46 M54) BMW Z8 (S62) Caterham 21 1.6L Caterham Super Seven 1.4L & 1.6L Citroën AX GT GTI (TU3FJ2) Citroën C2 1.4 (TU3JP from 2003 to 2006 74hp) Citroën Saxo 1.4i 1.6i 1.6i 16V VTS (TU5J4) Citroën Xsara 1.4i 1.6i 1.8i 1.8i 16V 1.9i 2.0i 2.0i 16V Citroën ZX 1.4i 1.6i 1.8i 1.8i 16V 1.9i 2.0i 2.0i 16V Daihatsu Copen 1.3L (K3-VE) Fiat Barchetta Fiat Bravo Brava 1.6 16V 1.8 16V GT 2.0 20V HGT Fiat Cinquecento Seicento 900i 1.1i Sporting Abarth Fiat Coupé 1.8 2.0 16V 2.0 20V Turbo Fiat Punto GT Turbo ie 1.4 1.8 16V HGT Fiat Stilo 1.6 16V Fiat Uno 1.4 Turbo ie Ford Escort Cosworth (N5F) Ford Fiesta 1.6 XR2i 1.6 16V Ford Sierra Cosworth (N5C N5D) Honda Civic B16 engines (EE9 EG6 EK4) Honda CRX B16 engines (EE8) Honda DelSol B16 engines (EG2) Honda Integra Type R (B18C6) Honda Legend C30 C32 engines/li> Honda NSX (C32) Honda S2000 (F20 F22) Hyundai Coupé (96-09) Jaguar XK8 Jaguar XKR Lamborghini Gallardo Lexus GS300 (2JZ-GE) Lexus IS300 (2JZ-GE) Lotus 2 Eleven Lotus Elan Lotus Elise Lotus Esprit Lotus Europa Lotus Exige Mazda 323 Turbo Mazda MX-3 (all excluding MPS) Mazda MX-5 NA & NB (B6-ZE BP-ZE) Mazda MX-6 2.0L (FS-19) Mercedes A-Class A45 AMG Mercedes C-Class S202 (96-01) C43 AMG Mercedes C-Class S203 (01-07) C32 AMG Mercedes C-Class S203 (01-07) C55 AMG Mercedes C-Class W202 (93-00) C36 AMG Mercedes C-Class W202 (93-00) C43 AMG Mercedes C-Class W203 (00-07) C32 AMG Mercedes C-Class W203 (00-07) C55 AMG Mercedes E-Class W210 (95-02) E50 AMG Mercedes CLK A209 (03-10) 55 AMG Mercedes CLK C208 (97-02) 55 AMG Mercedes SL R129 (89-01) 55 AMG Mercedes SLK R170 (96-04) 32 AMG Mercedes SLK R171 (04-11) 55 AMG Mitsubishi 3000 GT (6G72) Nissan 100NX (SR20DE GA16DE) Nissan 180SX S13 (SR20DET) Nissan 200SX S14 S14A (SR20DET) Nissan Primera GT (SR20DE) Nissan Skyline (RB25DET) Nissan Sunny / Pulsar GTI-R (SR20DET) Opel Astra G 1.4 16V 1.6 1.6 16V 1.8 16V 2.0 16V 2.2 16V Ecotec Turbo OPC Opel Calibra 2.0i GT 2.0i 16V Opel Corsa B 1.4i 1.4i 16V 1.6i 16V GSi Opel Corsa C 1.4 16V 1.8 Gsi 16V Opel Corsa D OPC Opel Speedster 2.0L & 2.0 Turbo (Z20LET) Opel Tigra 1.4i 16V 1.6i 16V Peugeot 106 1.3 Rallye 1.4i 1.6i 1.6 Rallye 1.6 S16 GTi (TU5J4) Peugeot 205 1.3 Rallye (TU24) 1.6i XS 1.6i GTi GT 1.9 GTi Peugeot 206 1.4 1.6 Peugeot 306 1.8i 16V 2.0 XSi 2.0 16V 2.0 S16 Peugeot 309 1.9 GTi 1.9 GTi 16S Peugeot 405 1.9 Mi 16 X4 2.0 Mi 16 2.0 T16 Peugeot 406 Coupé 2.0 16V Porsche Boxster before 2009 Porsche 964 Porsche 993 Porsche 996 Porsche 997 before 2008 Porsche Carrera GT Porsche Cayenne excl. 3.2 & 3.6 Porsche Cayman before 2009 Renault 19 16S 1.8 Renault Clio I 16S 1.8 Williams 2.0 16S Renault Clio II 1.4 16V 1.6 1.6 16V Renault Clio II RS (F4R) Renault Megane I 1.4 16V 1.6e 1.6 16V 1.8 16V 2.0e 16V Renault Megane II RS (F4R) Renault Safrane Biturbo (Z7X) Renault Spider 2.0 16V Subaru Forester before 2005 (EJ20 EJ22 EJ25) Subaru Impreza before 2005 (EJ20 EJ22 EJ25) Subaru Legacy before 2005 (EJ20 EJ22 EJ25) Suzuki Swift Sport ZC31 (M16A) Toyota Aristo (2JZ-GE 2JZ-GTE) Toyota Celica inc. GT-Four (3S-GE 3S-GTE 2ZZ-GE 1ZZ-FE 7A-FE) Toyota Chaser (1JZ-GE 1JZ-GTE) Toyota Cresta (1JZ-GE 1JZ-GTE) Toyota Corolla 1.4 16V 1.6 16V 1.6 16V VVT-i 1.8 16V VVT-i after 2000 (2ZZ-GE 1ZZ-FE) Toyota Mark II (1JZ-GE 1JZ-GTE) Toyota MR-2 SW20 inc. turbo (3S-GE 3S-GTE) Toyota MR-S (1ZZ-FE) Toyota Supra MK4 (2JZ-GE 2JZ-GTE) Toyota Yaris inc. TS 1.3 16V 1.5 16V VVT-i TVR Cerbera