Hi all need some help when driving at 60-70 mph I have boost surge its becoming very annoying now. I have checked all pipes etc anyone had this problem

You Mapped, if so causes are varied, new coil pack loom cured problem on mine, try a search quite a few threads on this, with lots of different answers and solution's, main problem seems to be the map highlighting weaknesses with the car.

Aye its been mapped changing the n75 today alot of threads point to that fingers crossed its that