i have an 01 jetta 1.8t. already modded the stock air box and have k&n filter, MBC and diode mod. currently running around 16 to 18 psi. but that drops to 14/15 above 4500rpms. so i have saved some cash and am looking to do some more stuff. just wondering what i should do next. been considering a chip, but dont know if it will make much a difference since im already running higher boost. or would exhaust be a better choice to add to what i have already done? any imput is welcome. im predicting that most people are gonna recommend i do a chip.