I did the h11 to h9 coversion a while back, much better light output.
Still wanted a whiter light so just over the weekend installed the v.4 led...
I have been using Meguiar's Ultimate all wheel cleaner.
No complaints, does a good job.
Sorry, 1 more follow up,
Did you use Sylvania basic or Silverstar or other ?
I've been considering going from h11 to h9 also, but can seem to find if there is a great difference in bulb life, as I don't want to be replacing...
No expert here but,
2017 Ram 1500
always air down to 15lbs, haven't had any issues
Separate names with a comma.