Hi, thanks for that info.
Few days ago, I dropped my gti valance off at my mate's garage to be primed/sparayed etc...
He told me to get hold of a reducer and clamps etc then he'd fit the back box for me when the valance was ready to go on...
Went to Southern Exhaust for starters, explained that I needed a reducer for Ed30->gttdi, asked for my reg. etc but they didn't have a clue about the sizes so were basically useless...
Went to TyreShops/Exhausts, again explained my situation, they lifted the car up... The bloke there had no idea either, said he'd only know if he cut and fitted it all there and then. I couldn't have it done tho cos valance not changed yet, so still got nowhere!
I asked in VW if they could tell me the pipe sizes, answer was no.
Told my mate that I had no luck, in the end he just said leave it to him and he'd do all of it at his garage(valance+exhaust), he couldn't believe it either that it was so much trouble just to get a reducer! I didn't think it would be this hard and cant understand why nobody seemed to know the size.
Dont suppose you can remember the size of the reducer you used? I'm not sure if the GTi exhaust and ED30 would be the same size anyway...