Somewhat cos gasses are released quicker and less back pressure can make turbo spool easier and quicker

Rule of thumb - if you upgrade anything that will preform better/bigger than stock a tune should be on the cards to optimise potential.

If its not a stock ecu or turbo....anything along them lines then fitting it and a tune is nearly always going to be needed.

My thoughts

i have a 3" turbo back exhaust, pod, and i'm running 10psi but dont have a t28 so yeah. an ecu tune to back those mods up would be good but i would probably have to get a t28 to make it worthwhile. what are you asking for it price wise? do i have to go custom dump pipe to fit a t28? i just got mine done. cheers

$200 posted