I have just fitted a new to me sports exhaust, I used a couple of the standard ford type (round with 2 holes) hangers - actually one was already on the pipe when it came to me, and i noticed a little vibration sometimes - it seemed to be the pipe against the chassis rail behind the rear wheel. I had a new rubber in stock so swapped the rear one out as it was a bit perished.
This seems have solved the vibration, but the pipe is now hard on the chassis rail.
I seem to recall having seen a longer oval rubber hanger in the past, and I wonder if replacing the front one, which is just behind the silencer, might lower the pipe enough to give me a bit of clearance.
Any thoughts before I search some hangers out. I notice halfords have some bright yellow hangers with a few holes, which might help for experimentation height wise, anyone used these (I'd rather they were not bright yellow)