This pic confirms Renault is still using the 2015 gearbox casing (which has been designed for a Merc PU) but other pics show Renault didnt put a spacer between engine and g-box; the latter is directly connected to the former (I assumed before the season kstarts that Renault will put a spacer because its 2015 turbo+compressor air box are obviously bigger than the Merc turbine...) but it seems Renault has just enlarged the turbo ducts openings on each side of the casing...
That means Renault has probably made its turbo-compressor airbox much more compact...
Maybe they finally decided to ditch their disc shaped compressor airbox and put an 'L' shaped duct which is intergrated to the engine's V, similar to Ferrari.
2015
2014