NGK AL9 Spark Plug
Specs, cross-brand equivalents, vehicle fitment, and live prices for the NGK AL9.
The NGK AL9 is a 18mm thread, gasket seat, heat range 9, copper electrode 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 | W14L | Copper | Buy |
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