personally, i don't rate champion spark plugs one bit. They will be the same as the dealers, but don't go to the dealers as you will pay more because they have the VW logo on. The best bet is to go to a tuning parts shop not halfords etc as they can sell you 6, where halfords try and sell you in 2 packs of 4. As for the plugs, it's best to go for the NGK Platinum with part number BKR5EKUP They're not cheap, I got a full set of 6 for £41 from Aldon Automotive not far from by house.