I was getting things together on that and it looks like it will be $1995 installed with cats and also includes Stage 8 bolts. Add a tune and low temp stat installed and it would be $2395.
Yes, it uses the factory air box and personally I do not think it is that bad for a factory piece. It keeps the filter encapsulated somewhat from the direct engine heat as compared to the open cone filter setups. With the unrestricted inlet tube from the TB to the box and a K&N filter it works very well.
IAT's would be like any other Maggie setup. Usually about 10-20* above ambient and probably in the 150* range after a hard run with no meth or nitrous cooling. Even with these temps, a proper tune will allow good timing and power.
As I progress and evolve these packages I am sure better systems will come along for sure.
No matter how you look at it the TVS2300 will add a good chunk of torque in the 2500-300o RPM area to make the almost two ton car move nicely
I also have a project twin turbo we are starting inital mock ups on over the next two weeks. Should be interesting for sure.
Hope this info helps and thanks