its a Kjetronic KR engine mate (well thats if its the original engine which it came with) where as the 2.0 16v engine out of the mark 3 is a ABF Digifant engine. the KR which me and you have in our valvers are mechanical injection, which is what that thing is below the airbox is with the braided fuel pipes/hoses coming out of it.
9a's if i can remember are a 2.0 bottom end which the mark 3 GTI 8v runs
(correct me if im wrong
)
dubsy