I started reading because I have similar, though probably less than your, pull to the left with my Hankook V12s. Then I kept reading and sound like you still have it without them. I'm subscribed out of interest. Hope it works out.
135 Coupe: Sedona Red/Boston Black/Gray Poplar
Premium Package, M Sport Package
Heated Front Seats, Premium Hi-Fi System, iPod and USB Adapter, Satellite Radio, Smartphone Integration