Ok this has been resolved , for free and in 30 minutes!, the front pipe wasnt faulty , I had made an error which had caused the problem ,
just updating in case anyone else had a similar issue. Recently I replaced the centre bracket on the exhaust , I had actually replaced it upside down so the exhaust literally hung approx 1/3 inch too high and was actually lifting the exhaust into the manifold by approx 1/3 inch , this made it unstable. how now reversed it and its solid , I appreciate all of your comments, Thanks again