exhaust matching question

hi  

i am after a stainless 4 branch manifold for my small block 1.3 (items listed on ebay for 36c/g40/gt)
i have been told that the diameter is increased from the standard size to the GTI diameter
would that mean i would have to get a GTI exhaust 1.6 or 1.8
if so what sections would i need, such as rear silencer and centre section..is there another section i need such as a flexi??  :dontknow:

depends how the 4 branch has been made! you would hope its been doen so it fits right up to a standard gti exhaust system, thats what i would do if it was me. note not all 4 branches are the same either so ask the seller!