This cross-reference numbers furnished as a guide . Due to differences in design, material, etc, plugs produced by various manufacturers do not have exact the same heat range. See recommendations sections for specific engine application. (More comparison chart...)
THREAD ENKER CHAMPION BOSCH N.G.K. MOTORCRAFT MARELLI Size Reach 9,5 mm 3/8" FS35P J18Y W10F BP4 FS35CP J18YC W10FC BP4S FS45P J14YC W9FC A52 FS50P BP5 CW3CP FS50CP BP5S FS55P J12Y W8F BP6 A42 CW4CP FS55CP J12YC W8FC BP6S A42C FS65P J11YC, J10YC W7FC A32 CW5CP FSC50P CJ8YC WS8FC BPM6A FSC70P WS7FC BPM6A FSC75P CJ7YC, CJ6YC WS5FC BPM7A 11 mm 7/16" FA45P H18YC AL82 F35P L95Y AE62 F35CP L95YC AE62C F45P BP-4H F45CP BP-4HS F55P L92Y W8B BP-5H AE42 CW5NP F55CP L92YC W8BC BP5HS AE42C 12,7 mm F65P L87Y W7B,W6B BP6H AE32 CW6NP 1/2" F65CP L87YC W7BC,W6BC BP6HS AE32C F65CPD L87BYC W7BTC,W6BTC BP6HT CW6NMC F85P L82Y W6B,W5B BP7H AE22 CW7NP F85CP L82YC W6BC,W5BC BP7HS AE22C F95P L81Y AE12 CW8NP F95CP L81YC AE12C 19 mm 3/4" FE35P N16Y W10D BP-4E AG82 CW4LP FE35CP N16YC W10DC BP-4ES AG82C FE45P N14Y W9D AG52 CW5LP FE45CP N14YC W9DC AG52C FE55P N11Y, N12Y W8D BP-5E AG42, AG32 CW6LP FE55CP N11YC, N12YC W8DC BP5ES AG42C, AG32C FE55CPD N11BYC W8DTC BP5ET AG32CT1 F6LMC FE65P N10Y, N9Y W7D BP5EL, BP6E AG22 CW7LP FE65CP N10YC, N9YC W7DC BP5ES L , BP6ES CW7LPS FE65CPD N9BYC W7DTC BP5ET CW7LMC FE85P N8Y, N7Y, N79Y W6D, W5D BP7E AG12 CW8LP, CW78LP FE85CP N8YC, N7YC, N79YC W6DC, W5DC BP7ES AG12C FE85CPU N8DMC W6DDC,W5DDC BP7EK CW8LSC, CW78LSC FE85CPD N8BYC,N7BYC W6DTC,W5DTC BP7ET F8LMC, F78LMC FE95P N6Y, N64Y W5D1 BP8E AG902 CW89LP FE95CP N6YC, N64YC W5D1C BP8ES AG902C FE145P N63YC W3DC AG202 CW9LP FE155P N60YC W2DC SFE55P C10Y F8D BCPR5E AGSP33 SFE55CP C10YC F8DC BCPR5ES AGSP33C SFE65P C9Y F7D,F6D BCPR6E AGP22 7LC SFE65CP C9YC F7DC,F6DC BCPR6ES AGP22C 16 mm Hex. SFE65CPD C9BYC F7DTC,F6DTC BCP6ET 7LMC 19 mm SFE85P C7Y F6D,F5D BCP7E AGP12 8LC 3/4" SFE85CP C7YC F6DC,F5DC BCPR7ES AGP12C SFE85CPD C7BYC F5DTC,F6DTC BCP7ET 8LMC SFE45L RFN14LY SFE45CL RFN14LYC Conical Seat 11 mm 7/16" FT25P BL17Y, BL15Y H10B AF52 FT25CP BL17YC, BL15YC H10BC AF52C FT45P BL13Y H9B BP5F AF42 FT45CP BL13YC H9BC BP5FS AF42C FT55P BL11Y H8B BP6F AF32 TW5NP FT55CP BL11YC H8BC BP6FS AF32C FT65P BL9Y H6B AF22 TW6NP FT65CP BL9YC H6BC AF22C FT85P BL7Y BP7F FT85CP BL7YC BP7FS Conical Seat 17,5 mm 11/16" FET45P H9D AGRF42 FET45CP H9DC AGRF42C FET55P BN12Y AGRF32 FET55CP BN12YC AGRF32C FET65P BN12Y H7D BP5EF FET65CP BN12YC H7DC BP5EFS FET65CPD BN12BYC H7DTC BP5EFT FET75P BN9Y H6D BP6EF AGRF22 TW78LP FET75CP BN9YC H6DC BP6EFS AGRF22C FET75CPD BN9BYC H6DTC BP6EFT TW78LMC FET85P BN7Y, BN6Y H5D BP7EF AGF12 T9LC FET85CP BN7YC, BN6YC H5DC BP7EFS AGF12C T9LC FET95P BN7Y, BN6Y H5D BP7EF AGF12 T9LC MT35P F14Y D9B AP-4F BF92 MT35CP F14YC D9BC AP-4FS BF92C MT45P F11Y D8B AP5F BF82 TM2NP Conical Seat MT45CP F11YC D8BC AP5FS BF82C 18 mm MT55P F9Y D7B AP6F BF42 TM3NP MT55CP F9YC D7BC AP6FS BF42C MT65P F7Y D6B AP7F BF32 TM4NP MT65CP F7YC D6BC AP7FS BF32C MT75P F62YC AP8F BF22 MT85P F79YC BF12 10 mm 12,7 mm1/2" T30 Z10C U7AC PE3 T70 Z8C C6HSA, G6M PE2 CU6N T90 Z6C U4AC C7HSA CU7N 12 mm 12,7 mm1/2" TW70 X4A D6HS, D5HS HE3 CX6N TW75 P7 X2A D8HS HE2 CX8N TW80 D10HS 19 mm3/4" TWE70 A8 X2 D6ES, D7ES,D8ES-L HG2 CX8L TWE75 A6 D8ES CX12L TWE80 A61 D10ES 9,5 mm3/8" FS20 UJ12, J12J W10E B-2 A11, AT10 CW2C FS30 J11 W9E B-4 A9, AT8 CW3C FS50 J8, UJ8 AT6, AT7, A7 CW4C FSC50 CJ8 WS8E BM-6A A7NX FSC50C CJ8C WS8EC BM-6AS A7NXC FS70 J7, J17LM W8E B6S A5, AT4, A4 CW5C FS75 J6, UJ6 W7E B7 AT3, A3 CW6C FS75C J6C,UJ6C W7EC B7S AT3C,A3C FS80 J4 W5E B8S AT2, A2 CW7C FS100 W4E2 B9S AT1, A1 8 mm 5/16" Conical Seat FSTC50 DJ8J HS8E BM-6F FSTC50C DJ8JC HS8EC BM-6FS FSTC80 DJ6J HS5E BM-7F FSTC80C DJ6JC HS5EC BM-7FS 11 mm 7/16" FA30 ATL8 FA50 H10 W9A0 B-4L AL7 FA70 H8 B-6L AL5, ATL4 12,7 mm 1/2" F20 W12A B-4H AE8 CW2N F20C W12AC B-4HS AE8C F40 W10A CW3N F40C 110AC F50 L90, L9J W9A BPH AE6 CW4N F50C L9C,L9JC W9AC B5HS AE6C F70 L88A, L89 W8A AE4 CW5N F70C L88AC,L89C W8AC AE4C F75 L85, L86 W7A B6H AE3 CW6N F75C L85C,L86C W7AC B6HS AE3C F80 L5, L82 W5A, W4A2 B7H AE2 CW7N, CW8N F80C L5C,L82C W5AC,W4A2C B7HS AE2C F100 L78 W4A1 B8H AE1 CW9N F100C L78C W4A1C B8HS AE1C 19 mm 3/4" FE20 N21 AG9 CW2L FE20C N21C AG9C FE30 W10C B-4E AG7 CW3L FE30C W10CC B-4ES AG7C FE40 AG5 CW4L FE40C AG5C FE50 N8 W9C B5E AG4 CW5L FE50C N8C W9CC B5ES AG4C FE70 N5, N6 W8C B6E AG3 CW6L FE70C N5C,N6C W8CC B6ES AG3C FE75 N4 W7C B7E AG2 CW7L 14 mm 19 mm FE75C N4C W7CC B7ES AG2C 3/4" FE80 N3 W5C, W4C2 B8E AG1 CW8L FE80C N3C W5CC,W4C2C B8ES AG1C FE100 N2,N60 W4C1 B9E AG901 CW9L FE100C N2C, N60C W4C1C B9ES AG901C 18 mm 12,7 mm 1/2" M30 D16C, UD16C M10, M10A0 AB-2 BT8, B8 CM3N M50 D14C, K13C M8AC, M8A0C BT6, B6 CM4N M60 D10C, UK10C M7AC A-6 BT4, B4 CM5N M75 D9C, K9C, K8C M5AC A-7 BT3, B3W CM6N M80 D6C, K7C M4A2C A8 M100 M4A1C Conical Seat MT60T 860C, 870C, RF12C D10AC A5FS BTF6, BF6 TM3N MT70T F10C D8AC A6FS BTF3, BTF31, BF3 TM4N
THREAD ENKER AUTOLITE NIPPONDENSO A.C. MARCHAL EYQUEM BRISK BERU K.L.G. Size Reach                                       9,5 mm 3/8" FS35P 77 W9P 46S, 47S   480S     FS35P   FS35CP     C46S,C47S   480CS     FS35CP   FS45P 76   45S   520CS K17Y   FS45P   FS50P   W16P-U           FS50P   FS50CP               FS50CP   FS55P 75 W-17P 44S   600S     FS55P   FS55CP         600CS     FS55CP   FS65P 74         K15Y   FS65P   FSC50P 2976 W17MP-U   T8   P17Y 14S-8F FSC50P   FSC70P   W20MP-U   T7     14S-7F FSC70P   FSC75P 2974 W22MP-U   T6   P15Y 14S-5F FSC75P 11 mm 7/16" FA45P 437   45LS         FA45P   F35P 276 W-9FP 46FS         F35P   F35CP     C46FS         F35CP   F45P   W-14FP           F45P   F45CP               F45CP   F55P 274 W-16FP 44FS GT35(D) 600S N17Y 14-7B F55P   F55CP           N17YC 14-7BU F55CP 12,7 mm F65P 273 W-20FP 43FS GT34 5(D) 705S N15Y 14-7B F65P 1/2" F65CP     C43FS     N15YC 14-7BU F65CP   F65CPD               F65CPD   F85P   W-22FP 42FS GT34(D) 755S N14Y 14-6B,14-5B F85P   F85CP     C42FS     N14YC 14-6BU, 14-5BU F85CP   F95P           N12Y   F95P   F95CP           N12YC   F95CP 19 mm 3/4" FE35P 57 W-9EP 45NS, 46XLS       14-8D FE35P   FE35CP     C45NS,C46XLS       14-8DU FE35CP   FE45P 56 W-14EP 45XLS   550LS L17Y 14-9D FE45P   FE45CP     C45XLS     L17YC 14-9DU FE45CP   FE55P 54, 55 W-16EP-U 44XLS, 43XLS 9H 600LS L17Y 14-8D FE55P   FE55CP     C44XLS,C43XLS     L17YC 14-8DU FE55CP   FE55CPD         C52LS3X   14-8DTU FE55CPD   FE65P 53 W-20EP-U 42XLS 8H 750LS L15Y 14-6D, 14-7D FE65P   FE65CP     C42XLS     L15YC 14-7DU FE65CP   FE65CPD         C62LZ3EX   14-7DTU FE65CPD   FE85P 52 W-22EP-U 41-4XLS 6H 755LS L14Y 14-5D FE85P   FE85CP     C41-4XLS       14-5DU FE85CP   FE85CPU               FE85CPU   FE85CPD         C72LS3X   14-6DTU FE85CPD   FE95P 51 W-24EP-U 41XLS H(F) 33R, H33RC 800LS L12Y 14-5D FE95P   FE95CP     C41XLS     L12YC 14-5DU FE95CP   FE145P     438XLS         FE145P   FE155P     436XLS         FE155P   SFE55P   Q16R-U FR3CLS   FC42LS   14F-8D SFE55P   SFE55CP     CFR3CLS       14F-8DU SFE55CP   SFE65P   Q20PR-U       D15Y 14F-6D SFE65P   SFE65CP           D15YC 14F-6DU SFE65CP 16 mm Hex. SFE65CPD         FC62LS3X   14F-7DTU SFE65CPD 19 mm SFE85P   Q22PR-U       D14Y 14F-5D SFE85P 3/4" SFE85CP           D14YC 14F-DU SFE85CP   SFE85CPD               SFE85CPD   SFE45L 985   FR4LE         SFE45L   SFE45CL     CFR4LE         SFE45CL Conical Seat 11 mm 7/16" FT25P 16   45TS, 46TS   450JS, 500JS   18K-7B FT25P   FT25CP     C45TS,C46TS       18K-7BU FT25CP   FT45P 15 T16P-U 44TS   505JS     FT45P   FT45CP     C44TS         FT45CP   FT55P 14 T20P-U 43TS   550JS     FT55P   FT55CP     C43TS         FT55CP   FT65P 13   42TS   600JS     FT65P   FT65CP     C42TS         FT65CP   FT85P 12   41-5TS, 41TS   705JS     FT85P   FT85CP     C41-5TS,C41TS         FT85CP Conical Seat 17,5 mm 11/16" FET45P           G17Y 14K-9D FET45P   FET45CP           G17YC 14K-9DU FET45CP   FET55P     43LTS       14K-7D FET55P   FET55CP             14K-7DU FET55CP   FET65P 765 T16P-U 42-5LTS       14K-7D FET65P   FET65CP             14K-7DU FET65CP   FET65CPD               FET65CPD   FET75P 94 T20EP-U 42LTS C7H 800LJS G15Y 14K-6D FET75P   FET75CP     C42LTS     G15YC 14K-6DU FET75CP   FET75CPD               FET75CP   FET85P           G14Y 14K-5D FET85P   FET85CP           G14YC 14K-5DU FET85CP   FET95P           G14Y 14K-5D FET95P   MT35P 36 MA9P-U 85TS   K300JS   18K-7B MT35P   MT35CP     C85TS       18K-7BU MT35CP   MT45P 35 MA14P-U 84TS   K450JS   18K-7B MT45P Conical Seat. MT45CP     C84TS       18K-7BU MT45CP 18 mm   MT55P 34 MA17P-U     K550JS F15Y 18K-7B MT55P   MT55CP           F15YC 18K-7BU MT55CP   MT65P 33   83TS     F14Y 18K-6B MT65P   MT65CP     C83TS     F14YC 18K-6BU MT65CP   MT75P 32             MT75P   MT85P               MT85P 10 mm 12,7 mm 1/2" T30 2796 U20FS S104F 4 H50     T30   T70 2795 U22FS S102F         T70   T90 2794 U24FB           T90 12 mm 12,7 mm 1/2" TW70   X20FS-U MC124F, S124F         TW270   TW75 2715 X24FS-U MC122F, S122F         TW275   TW80   X28FS MC121F, S121F         TW280 19 mm 3/4" TWE70   X22ES-U S123XL         TWE270                       TWE75 2755 X24ES-U S121XL         TWE275   TWE80   X31ES-U           TWE280 9,5 mm 3/8" FS20   W9-U 48     K19   FS20   FS30 297 W14-U 46, C46, 47, C47     K19 14-9EU FS30   FS50 295   45, C45   500CM   14-8EU FS50   FSC50 255 W20M-U S45   500CT     FSC50   FSC50C     CS45         FSC50C   FS70 294 W20S-U 44, C44, 44-5, 44-5V M6T 700CM K17   FS70   FS75 315 W22S-U 42, 43, 43COM M5T 755CM K17   FS75   FS75C     C42,C43, C43COM     K17C   FS75C   FS80 313 W-24S 42         FS80   FS100   W-27S 41 M4T 1000CM     FS100 8 mm 5/16" Conical Seat FSTC50 2956 WA-20M S45T TC8   U17   FSTC50   FSTC50C     CS45T     U17C   FSTC50C   FSTC80 2954 WA-22M S42T TC6   U15   FSTC80   FSTC80C 2954 WA-22M CS42T TC6   U15C   FSTC80C 11 mm 7/16" FA30               FA30   FA50 216 W-14L 45L   500AM     FA50   FA70 215 W-16LS 43L         FA70 12,7 mm 1/2" F20     46F 37S 200     F20   F20C     C46F         F20C   F40               F40   F40C               F40C   F50 416 W14FU 45F, 420Z 6N 500 N19   F50   F50C     C45F,C420Z     N19C   F50C   F70 415, 2656 W16FS 44F, 422Z 5N 700 N17 14-7A F70   F70C     C44F,C422Z     N17C 14-7AU F70C   F75 413, 414 W20FS 43F, 43FF, 425Z 35(B.P.M.) 750   14-7A F75   F75C     C43F,C43FF       14-7AU F75C   F80 2635, 2653 W-22FS 42F, 430Z 35S 755, 850 N15 14-5A F80   F80C     C42F,C43OZ     N15C 14-5AU F80C   F100 411 W-24FS 41F, 41FF, 445Z 4N 1000 N14 14Z-4A F100   F100C     C41F, C41FF,C445Z     N14C 14Z-4AU F100C 19 mm 3/4" FE20 397, 398             FE20   FE20C               FE20C   FE30   W-14E 47XL   350L     FE30   FE30C     C47XL         FE30C   FE40       36H       FE40   FE40C               FE40C   FE50 396 W-16ES 46XL, 46N 36HS 450L L19   FE50   FE50C     C46XL,C46N     L19C   FE50C   FE70 394, 395 W-20ES 45XL, 45N   600L, 705L L17 14-7C FE70   FE70C     C45XL,C45N     L17C 14-7CU FE70C   FE75 393 W-22ES 44XL, 44N 35HS 750L, 755L L15 14-7C FE75 14 mm 19 mm FE75C     C44XL,C44N     L15C 14-7CU FE75C 3/4" FE80 2614 W-24ES 43XL, 43N H(F)S34 805L L14 14Z-3 FE80   FE80C     C43XL,C43N     L14C 14Z-3U FE80C   FE100 2594 W-27ES 41XL 5H 1000L L14 14Z-3C FE100   FE100C     C41XL     L14C 14Z-3CU FE100C 18 mm 12,7 mm 1/2" M30 376   87 21L, C, E K300M   18-10AU M30   M50 375 M14 C85H 20L, C, E K500M   18-8AU M50   M60 374 M17 83COM, 83H 19L, C, E K600M   18-7AU M60   M75 373 M22 C82 17C K750M   18-5AU M75   M80 372   C81 2 13       M80   M100   M-24S           M100 Conical Seat Koni~no sjedi{te MT60T 117   85T 23F K250J     MT60T   MT70T 115   C84T   K300J     MT70T