📘 AI Summary: Spark plug cross reference tool. Enter a known brand and model (e.g., NGK BPR6ES, Champion N9Y) to get equivalents from other major brands. Data from manufacturer catalogs.

Spark Plug Cross Reference

Tool description: Find compatible spark plugs when your original brand is unavailable. Covers NGK, Champion, Bosch, Denso for classic cars (1960s-1990s) and vintage motorcycles.

Brand of known plug:

Model number (e.g., BPR6ES, N9Y, W8DC, W20EP):

Why Cross Reference?

Many vintage plugs (Lodge, KLG, AC Delco old numbers) are discontinued. Use this tool to switch to modern, available brands without changing heat range. Always verify thread reach and seat type.

Last updated: May 10, 2026