18' rims are a tad too big, OP. You turning it into a Monster Truck sort of thing? I think 2' is the absolute biggest you can go without doing quite a bit more to the car.
Also, you shouldn't threadjack, especially your own threads. It makes it very easy for you to end up with an unresolved problem. Also, I assure you, there are about 15 things on your car that need attending to more than large rims and headlight do-das. Just saying.
Not being a d!ck...just a Doug!
As desperate as this sounds, in comedy, 'likes' and 'views,' 'friends,' and 'retweets' really help. If I've ever helped you, please help me by friending, liking, viewing, and retweeting. It makes others think I have a following...it'll take you a minute or less. If you could, I'd really appreciate it!
A recent set--NSFW audio: https://youtu.be/_dcxcZfD6dg
Mangofy your E46!