Hi, on the exhaust flange, where the cat bolts to (not for long!) what is the fitment? Are there just holes through which the cat is bolted to, with a nut & bolt or are there studs like off the turbo? I ask as I am about to de-cat and change the exhaust system as soon as I have had an MOT done. If they are a nut & bolt fit anyone know the specs? or what size nuts as I want new ones ready as I expect some grief looking at how rusty they are from all the heat and age. Any help much appreciated.