I'm running 275/30/20 +27 in the rear and I'm on swift springs and keep hearing a scrubbing noise going over larger dips. We trimmed a bit of the fender lining which helped but it's still there. How much do I need to cut. Also, I saw something on here regarding the bumber brackets being bent, how would I do that and could that be the issue? Need to fix this as it sounds terrible and I cringe every time.

 

You need to shave your bumper bracket. Dont know how much but that is what your hearing.

 

yes its most likely the bumper bracket!
you can do any of these (in order of easiness):
-get superduper stiff coils
-file it down slightly
-remove the screw completely and hammer the tab up (only do this if you arent doing aftermarket rear bumpers in the future) rear shoudl still stay intact
-cut that section with a dremel and relocate the screw

 

Tire size is all good, just need to tweak the clearance a bit.

 

Yeah i had the same issue then i shaved the bracket and grinded it down and didn't have to remove the screw

 

I have oem 19s with 245 front and 275 rear on BC coils w/ SPC camber kits front/back with 20mm spacers all around. I rub all the time on the rear bumper bracket. Can I get enough clearance in the rear if I just hammer up the bracket or does it have to be removed?

 

You need to take a dremmel to it.