It's the opposite.
Thom's kit actually pushes the top of the wheels out, away from the coilovers. If anything, you will need to watch your fenders to see if they will rub the tires.
It is minor difference however, I think we are talking 5-6 mm.(from my experience)
mine:
Oh Crap... I've already got a 5mm spacer on my rear, I'm wondering if it will stick out too much now? My Volks are 9.5 or 10 wide. It should hopefully clear my coils, I've got slightly bigger coils I've got Eibach springs over stock with an adjustable coil perch on my bilsteins...