Factory Pro designs and produces
the best performing">
Denso Iridium Spark Plugs
|Find My Plug! Motorcycle||Denso MC Application Guide|
|Find My Plug!
Karts / Snowmobile / Personal Watercraft
|Denso K-S-PW Application Guide|
|Spark Plug Specifications
(when you know what length. diameter, style you want!)
|Know your spark plug numbers now and want to upgrade to Iridium power?||Cross Reference Guide|
|De-mystify Denso Iridium spark plugs
(the most descriptive source around!)
|Part Numbers decoded!|
|How to install spark plugs!||Official "How to" guide|
|Denso (ND, Nippon Denso) is the largest OEM supplier for autos and
motorcycles of electrical components in the world. Sometimes, people forget that Denso
makes pretty darn good spark plugs, too! Wide heat range properties discourage plug
fouling at low speed AND overheating at high speed.
We have been using Denso spark plugs in our AMA Supersport bikes since Denso was Nippon Denso and ND. We have found that some standard, <$10, off the shelf, Denso spark plugs
work as well as $75 special spark plugs - on a professional roadrace level!