wow. you have a grand and 15x6.5 +40 rota's is all you can come up with?
http://www.wheelsmaster.com/rt_specs.jsp
^^consult that. also consult the wheel fitment thread. 6.5 +40 is not "flush", unless you're measuring the flushness of the wheel to the point where the harness comes out of the firewall. cheers.