S550 eibach lowering springs and 305s
 

Hey guys I'm new here but I have a s550 gt and wanted to lower it and put some 305s on the back and no where that I looked up or even American muscle said they didn't know so I took the leap that did it 1.3" in the front and 1.5" in the rear with 20" 8.5" rims in the front and 10.5" wide in the rear and I slapped some Micky Thompson 305/35x20 on that back and it tucks in perfect with 2000 km (Canadian here) on them and I have never rubbed once. Speed bumps or a hard launch so it's doable cheers

Congrats and welcome, pics would help. lol