stg 1 290, spark plugs?

[missmouse]

Anyone running different plugs in their stg 1 290? Ive read RS7 plugs are best. NGK Iridium

 

[nd-photo.nl]

Im running these as per recommendation of my tuner. NGK Laser Iridium ILFER7C8EG. I also looked a little bit in the RS7 plugs, but did not went for them. There are also some negative signs out there, which made me hesitant. Its running perfectly with the NGK ILFER7C8EG.

381hp 524Nm

Compared to Bosch FQ5NPP332S 8160 Double Platinum spark plugs