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hi everyone,im looking at upping power on my 99 uk wagon turbo from 300/300 to approx 340-350,ish, is the standard subaru 3 port a good enough item for boost control as will be running 1.4-1.5bar boost or do i need an aftermarket one like perrin etc,etc? any views would be a great help,thanks.( i have 2 port at the moment)