Search vehicle applications, decode any part number, and compare every major manufacturer — copper to ruthenium, ranked honestly.
Demo catalog: vehicle configurations across makes and plugs. Production build runs on licensed ACES fitment data for full coverage — same interface, bigger database.
Reads NGK, Denso, Champion, Bosch, Autolite, ACDelco, Pulstar — plus NGK glow plugs and Denso industrial plugs.
Returns every brand's equivalent with compatibility ratings and a side-by-side difference viewer.
Every part number is a spec sheet in disguise. We break it apart — thread, heat range, reach, electrode, gap — using each manufacturer's official numbering system.
Decoder rules transcribed from manufacturer numbering charts, including NGK glow plug and Denso industrial systems. Modern laser-iridium long codes are decoded best-effort and labeled. Motorcraft and 4-digit stock numbers are assigned catalog numbers, not coded. Always confirm against the current catalog.
Electrode metal is what you're really paying for. Harder metal → finer electrode → stronger spark for longer. Match the tier to how long you'll keep the vehicle.
Enter any plug and get every brand's true equivalent — same fitment, rated for compatibility, with a side-by-side difference viewer.