I did it step by step Revo, stage 2 is great because it makes it easier to drive with the power spread out rather than one big hit. If i remember correctly i went stage one, then turbo back, then stage 2, then S3 & twintercooler, then pump + stage 2+, then finally intake. Only did the intake last because i didn't really want one but it was obvious this arae was holding the car back, glad i did in the end because it felt like i got about 30 BHP with the intake.