Spark Plug Chart
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SPARK PLUG NEAR EQUIVALENT TABLE. REFERENCED TO NGK
This table is a guide due to differences in design, materials etc. Plug produced by various manufacturers do not have exactly the same heat ranges.
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 HOTTER COLDER 
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| NGK |
B6HS |
B7HS |
B8HS |
B9HS |
| AUTOLITE/TLINER |
414, 2655 |
413, 2636, 2653, 4092, 4093 |
2635, 2654 |
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| BOSCH |
W7A, W7AC, W7AO, W7AP |
W5A, W5AC, W5AP |
W3A, W3AC, W4A, W3AO, W3AP, W4A1, W4AZ, W4A5, W4AC, W4AP |
W2A, W2AC |
| CHAMPION |
L7J, L9J, L10, L82, L82C, L85, L86, L86C, L86CC |
L4J, L5, L77JC, L78, L81, UL4J, UL81C, UL81J |
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| KLG |
F75 |
F80 |
F100 |
F220 |
| LODGE |
H, HN |
2H, 2HN |
3HN |
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| MARCHAL/ VALED |
35, 35B, 35M, 35P, 35/36D, 35/36P, 35/36R |
4N, 34S |
2/32, 2/33 |
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| MARELLI |
CW6N, CW6NJ, CW7N, CW7NJ, CW67NJ, CWC64J, CWC7NJ, CWC64J, FC7N |
CW8N, CWC9NJ |
CW8N, CWC9NJ |
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| MOTORCRAFT |
AE3, AE3X, AV3CU |
AE1C, AE1X, AE2, AE2C, AE2X, AV2CU, AV2X |
AV1X |
AE901, AV901CU |
| NIPPON-DENSO |
W20FS, W20FS-U |
W22FS, W22FS-U |
W24FS, W24FS-U |
W27FS, W27FS-U |
| PAL |
14-8, N7 |
14-9, N8 |
17-9 |
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| UNIPART/ SUREFIRE |
GSP550 |
GSP560 |
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Trebor, OCT. 1999
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