http://www.f1analisitecnica.com/2015/01 ... p4-30.html
Quick summary.
The nose will not be like the RB10, instead it will be closer in shape to the 2009 Brawn.
Particular attention has been paid to the area around the turning vanes and front brake ducts in an effort to reduce turbulence and improve the quality of airflow to the rear of the car.
The central and rear area of the car will be the most interesting. The sidepods will be tall in the center section and very tight towards the rear.
The extreme compactness of the rear is possible because of the positioning of components of the Honda engine.
Here is a direct Google translation of a section of the article with regards to the exhaust layout:
"The exhaust manifold 3 , the output from the cylinders , are joined in the manifold that is directed toward the turbine set well back and is attached to the cylinder block."
It also says Prodromou is still studying the concept of exhaust blowing even though the FIA rules prevent it.
Prodromou and his staff are still looking at interesting ways of exploiting exhaust gas and hot air from the radiators to create downforce at the rear of the car. This is why last years butterfly suspension will not be used.
The car will initially use the new Red Bull inspired front wing seen in practice at Abu Dhabi. From autosport forum.