I did alot of time consuming research in this area, then I gave Ramair a call and spoke to a very nice fellow called Ryan. He explained to me the he had a 340bhp Mk4 turbo and he had a custom setup where he put a bigger induction on and used a reducer.I asked him about the cai pipes and he said there more for looks and dont need to be used, he said that using the setup you see below he didn't need any kind of heat shield or anything, it cost me £59.99 posted and imho, it was worth every penny.Give them a call and ask to speak with Ryan.http://ramair-filters.co.uk/contact-us
so where about in north wales do you live ?
It included everything I needed apart from the julb clips cost me £2 at B&Q
holywell pal