NGK 6645 Spark Plug
Specs, cross-brand equivalents, vehicle fitment, and live prices for the NGK 6645.
The NGK 6645 is a 14mm thread, 26.5mm reach spark plug. These specifications are decoded from the NGK part number and determine which plugs it safely cross-references to — a valid equivalent must match the thread, reach, seat and heat range.
Cross-reference equivalents
| Brand | Part | Metal | Buy |
|---|---|---|---|
| Denso | VKH20 | Iridium | Buy |
| Denso | FK20HR11 | Iridium | Buy |
| Denso | IKH20TT | Iridium | Buy |
| NGK | ILZFR6C-K | Iridium | Buy |
| Bosch | FR7NPP33 | Double Platinum | Buy |
| Bosch | FR7SI30 | Iridium | Buy |
| Champion | CCH7418 | Copper | Buy |
| Champion | CCH9044 | Copper | Buy |
| Champion | OE190 | Copper | Buy |
| Champion | OE190/T10 | Copper | Buy |
| NGK | 90428 | — | Buy |
| NGK | DILFR6D8 | Iridium | Buy |
| NGK | LFR6AIXLPG | Iridium | Buy |
| KH6RTPP-11 | — | Buy | |
| KH6RTPP-9 | — | Buy |
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