What spark plugs you using for M's?? Iridium??

[sbosmt]

I have an M7 and was thinking of running iridium NGK in my sled and wondering if you guys have tried them and had improvement or what your results were. Local parts store says not to run them in a machine that didn't come from the factory with them. And yes I know they cost more, that is not my question. Or should I just stick with Th BR9EYA? It is an EFI Sled.

 

[sbosmt]

Does anybody still use spark plugs or pull them out to lose some weight. Nobody tried something other than stock?

 

[Sofa King]

Used Iridiums in my 05 M7 from new
Never had problem with fouling
New set in the fall never look at them again
Also have Speedwerx complete from head to can
Boondocker box running -6 to -7 top end
Over 10,000 Km on engine same numbers from new
I would recomend Iridiums