"The new GIAC stage 2++ file. Developed with Statller power Developments in the U.K. (Doing a lot of cool 500hp stage 3 stuff at the mo) is a variation on the 2+ hardware based theme for EA133 k04 engines.
Apparently this file is performing better than the extreme files of late and is something for extreme customers to try out though requires a traditional 2.75 intake rather than the 3 inch that the extreme uses.
It can also be used on cars without the rs4 rail valve and even an upgraded intercooler, though more power is expected with better quality parts.
They've seen 346hp at the engine on a conservative dyno (350-60 elsewhere) without an rs4 valve and upgraded IC"
Anyone running this tune and can provide feedback?