I had the stock 4 bar FPR on and i was bored so i put the 5 bar on...im not getting 2-3 more psi of boost and theres a different sound from the exhaust (weird?) but there is def a difference until i got the CEL...i heard that sometimesthe ecu will learn the new 5 bar but i dont think this is the case so can i use a vag-com or do i need a "tune"

 

why, just why? Put the 4bar back in and dont mess with stuff that dont need changed

 

x2 [:@]

 

haha okay fine!