Denso Iridium Power

anyone have tried those spark plugs ? i won them and need to choose part number which one i will pick up and use in my 13B

any experience ?

 

These sort of "grunty" plugs will make little to no difference in a stock or mildly tuned engine. They come into ther own in highly tuned engines where high chamber pressures can literally "blow out" weak sparks. In combination with ignition amps, significant gains can be made.
But hey, who cares, they were free!

 

but which ones could be used in 13B ?

 

anyone ?