i ordered some wheels and tires for my impala and the front wheels fit fine but the back ones will not go on the hub because the tire hits the tail pipe which is right next to the frame. it is a very tight spot and the muffler shop said there is no where else to run the pipes. what is your opinion on using adapters, or any other suggestion would be greatly appreciated. the wheel goes right up to the studs but need about another 1to 2 inches to fit right. the wheels size i am running is 225/40zr18. my offset is 5/4.75. thanks