Opel Kadett 200is | Branches wanted

Hi Ralf

Im looking for a set of Branches for the Opel 20seh 8v motor ,im not exactly sure whats the "right" size as i cant find alot of info on these motors

Could you please quote me on the following and specify the sizes :

Cowley
TNT
Brospeed

or any other brands that you keep ..

Would really prefer a set of stainless steels ones if possible

The car currently has a (new section from after the fire wall) 53ml to 56ml (center) and than 53ml to one back box sounds confusing lol

Thanks
Mo