My LS400 exhaust flanges, like many, are rusted away behind the cats and will probably need a new centre section. But looked at the offending area under the car yesterday and saw that bolted on sturdy brackets on the exhaust just past each cat are two large, protruding, circular steel discs about 3 inches across..............................does anyone have any idea what these are or what they might do please ?
As always, very grateful for any helpful replies please.
Thanks