BC Coil wheel rub
 

Alright guys, SO I recently lowered my G37s on BC BR Coils and put on 25mm spacers all around. Wheel specs are 19x8 +30 F 19x8.5 +33 R(G35 Rays). Front is at 26' and rears are 26.5', basically maxed out at height.
My problem is I'm still rubbing in the rear on dips. I already cut some of the fender liner in the rear and used a dremmel to shave down that bracket or whatever it's called. Also, I'm pretty sure my friend accidentally messed with the preload because my coils didn't clunk before when I was slammed but when we raised it, it now clunks in passenger rear.
Will completely shaving the rear bumper bracket and using 3m tape to hold it up resolve my problem? I don't plan on switching out rear bumpers ever. I'm just worried because I plan on driving to New York and back over the summer. Any help is appreciated guys.

I'd run without spacers just to see how much further you can go out before you get some contact. A 19x8 +5 is aggressive so there's no way around that if you plan to run stock camber. If you're open to running extra camber that should get you ok w/ those spacers as the height you're currently at is pretty good, at least you're not already slammed. I assume you have a coupe, if you're in a sedan you're going to need a lot less spacing :)

Yes I have a coupe. How much camber would I have to run in order for it not to rub? Would the rubbing have any crazy negative outcomes if I decide to just keep the setup other than just hearing it rub?

smaller spacers...?
You're running the equivalent of a 19x9 +17 or 19x9.5+23 up front which is aggressive for coupes

The front is fine, would switching to a 15mm spacer in the rear fix my problem? Sorry guys, I'm not very good with the whole offset thing. I just know that the closer to 0, the more aggressive it is. And about the clunking noise... Would it just be adjusting the preload back to normal or..?

Yes, a 15mm spacer should get you some clearance at the fender, still pretty flush but much better than that 25mm.