[GTI MKV]

chips are best way to go. they will give you atleast 18PSI. the stock turbo suposivly has a peak of 15PSI already anyways (stock turbo). they range in price from 500-600 basically.

 

[GTI MKV]

the chip basically does remap yer ECU. with the APR chip you can purchase a device with it that lets you change into different modes with the push of a button