My front wheel bearings are bad and I was just wondering will my rims size 18" and/or coilovers void my warranty? I'm wandering should I put it back to stock or will that even matter and should i put everything back to stock like exhaust, header, strut bars, coilovers, and rims?

 

wheels maybe they will, saying the offset of it put extra strain on the bearings. if its the same size, width and offset as the stock 18's maybe you can argue.

coilovers definately. they will most likely blame you lowering the car too much causing failure.

strut bar, exhaust and header has nothing to do with the bottom suspension so i don't think those will matter.