I somehow doubt that will be enough.

what kind of suspension do you have? or do you have just cutted springs?

personaly, I'd raise the car a little and put some smaller spacers in.

just my 2 cents

I have 225 /40 / 18" with 10mm spacers and lowered it something around 40mm, reworked housings and I still have to pull the fenders. I get that screeching noise and the funny smells if I drive in track mode lol
sucks.

on the other hand I never could drop my car any lower because I have the M-Tech bumper with M3 GT flaps....and our curbs and roads in Germany arent so smooth like the Florida ones.