Hmmmm, I wouldn't recommend at all.
And personally, I avoided drilling holes into my pillar. I used double sided sticky, and a small zip tie from the snorkel head to the front led bar mounts.
Before installing the zip tie, eventually the double sided sticky was no longer sticky , probably after a good month. And I noticed a big dent on top of my door. My conclusion, the snorkel mount shifted down and pushed on the door when I was off roading. However, I'm happy that it didn't dent my pillar.
So, I would not take it through the car wash. Another thing is, you need be careful when off roading. Making sure you don't hit your snorkel.
And, if you have ditch light brackets like I. I personally don't know how others made it so the snorkel doesn't make contact with them. But for me. It touches. I guess, if you want to make the hilux snorkel fit AS BEST AS POSSIBLE. You sacrifice something else.