My car has a custom stainless system Norman built as per the original (but slightly bigger bore). The only hangars are on the tail pipe at the left side rear of the car and on the right side by the petrol tank/suspension arm as you describe where the silencer itself goes at right angles across the car.
The only other ‘support’ is the one from the engine block at the bell housing to the downpipe to protect the exhaust manifold. THere is an image on Citronet of the underside of a Traction which shows an exhaust mount around the drivers seat area on a 7c but that may not be on later 11 models?
It’s been on there 7 years now with no issues
