[M5Rick]

Originally Posted by Koza

Hi guys,

i have an M5 F10 and i got Stage 1 (700HP) before 15000km. (9000 miles).
Yesterday i had issues in high RPM.
We removed all sparkplugs and one was damaged.
Look here:


Now i bought new stock plugs and now it runs again as he should.

I found this post here and now i am thinking about to buy the sparkplugs from ngk with one step colder. or better two steps?

Thanks and greets from germany!

One step should do it.