Iridium Spark Plugs

[Ghostrider]

I don't venture into these pages very often, but this is more than just a classic issue.

How do we know the difference between NGK or Denso Iridium Spark Plugs?

Does anyone know for sure??

The difference between NGK BPR6EIX-11, BCPR6EIX-11 and BKR6EIX-11 and Denso IK20, IQ20 and IW20.

They are identical in heat range, so what does the different part numbers represent.

Cheers, D

[RB30-POWER]

Here is the part no key for you.

http://www.stealth316.com/misc/ngk-partnumberkey.pdf

[Ghostrider]

Thanks for that.

Makes an interesting read.

Another point, by that key it makes all 3 virtually the same so why do they have all 3 in their range.

Cheers, D

[blind_elk]

Spark plugs differ in more than just heat range. Certainly in NGK, they have different designations depending on things like thread diameter and length, hex head size, and electrode design.

In NGK, there are 10 basic designs of plug and 6 electrode configurations in the IX Iridium range.