[OrangeCat3800]

Basically all the iridium and ruthenium plugs on sale say that you cannot gap the plugs. The preset gaps on these plugs range from 0.030" to 0.044". I got the NGK Ruthenium plugs with 0.032" preset gap. So, if I don't adjust the gap at all, is there going to be any problem?

 

[Facusan]

If the coil packs are weak, you may have misfires under load. Recommended gap for T5 engines is 0.028" (0.7mm). If those plugs are single electrode, i would adjust them to 0.028". If not I would go with other spark plugs. Bosch FR7NI33 (double iridium) is the OEM of the genuine plugs.