Looking for self-install mods for my sons GTI. Chris and his team were extremely helpful and patient as we ask question after question about the various mods... we ended up buying a CAI and DV. Would have got a downpipe as well but they were currently out of stock. Also, without pressure, Chris mentioned other things to be on the lookout for on a GTI with over 100,000 miles. We will most likely be bringing the car in for a timing belt install.