Looking people's thoughts please, Im currently running 240-640/18" Michelin slicks for circuit racing, I'm considering arching the car to run a bigger slick, ie the 265 Dunlop btcc slicks, should i expect to see a massive difference in grip with the wider tire ? I don't mean the brand, just the extra width ? Trying to figure out if it's worth cutting up my clean 2 door shell just lol