hi ive just bought a golf gti tdi 150, im looking to upgrade the power buy at least 60 percent, while giving attention to torque and fuel consumption, im new into mod seen and havent got a clue how to do it or who to go to. have heard people talking about 2 turbos one small , one big, forced induction, intercooler, basically im looking for the complete engine package, is there any company were i can get advice and will carry out the work,will be waiting to hear of any specific setups. also looking for tips on improving handeling.