In east Hull you've got Ricci Concept, who are on Hedon Road not far from Myton Bridge. VAG specialist do modifications, supply parts like
Koni, Supersprint, Schrick etc - not particularly cheap but cheaper than the dealers. I've used them for years without problems, contact number is 322446.
In west Hull is Hull City Motor co, they are on Anlaby Road near the old Boothferry Park. Independent VW garage - don't know much about them to be honest other than a guy from there had his mk2 1.8t in the Golf+ recently, contact number is 565788.
Local Club GTI meet is at Gardeners Arms at Coniston 1st Wednesday in the month, the Demon lads meet at Sailmakers on St Andrews Quay on the last Wednesday, check the Demon VW website to be sure. Helpful crowd at both meets.
HTH
