Hi I have finally got round to changing the exhaust bolts on my 981, the cat to exhaust flange ones are a real pain... as everyone says they are. I used a g clamp with a large nut on the back to push against, whilst applying pressure and used a blow lamp to heat up the bolt and kept tightening the clamp till it goes crack! I also changed the exhaust manifold bolts and any other rusty looking bolts while I was under there, to save potential problems in the future.
regards Glenn