just to add my bit, I'm running the DTUK box on my 177 car hasnt missed abeat, its been a great box. I've gone for the twin channel (boost and fuel rail) sensors.
Took it to the ring today and it proved itselft ont he 1000 mile round trip acceleartion and pull much better than without it. Until Evolve get a switch setup for the 177 I recon its best option
Give Andrew a shout hes a member on here.
F30 335i Coming Soon