I didn't realize that the stock plugs were NGK platinums until I pulled them out. I went with the IHK20 plugs. The stock plugs with 16k on them looked pretty bad. I noticed immediately that my idle improved and it seems to rev a bit smoother. I went colder for future N20 use. Pretty good way to spend 75.00.

 

This is a new plug that can be ordered by Monarch! The 1 degree colder plug is LFR6A-1X-11 and has a NGK part number of #6619.

 

Thanks man!

 

Got my IKH16's yesterday. Will be going in this weekend!

 

FYI, silver has the highest electrical conductivity of all metals, not copper, or iridium, or platinum. See, e.g., http://www.lehigh.edu/~amb4/wbi/kwar...nductivity.htm. Of course, silver corrodes/tarnishes fairly easily, so it wouldn't make for good plugs, I suppose.

 

the other advantage to iridium is they work with nitrous. nitrous and platinum have a bad chemical reaction. also iridium has less resistance, therefore more spark energy with the same voltage. cheaper upgrade than an ignition