Ferrari start the European leg of the season, in Spain, with a heavily revised version of the SF15-T for Sebastian Vettel and Kimi Raikkonen.
Respected Ferrari 'watcher Leo Turrini has reported on his blog that "70 per cent" of the car has been revised for the first race of the European season, with only the front of the SF15-T to be recognisable.
"It's a well-known fact that all the teams turn up for the first European race with practically new cars compared to what we saw in Bahrain," confirmed Ferrari's strategy chief Inaki Rueda ahead of Barcelona.
Turrini also wrote that for several years now Ferrari have blamed their problematic wind tunnel for "gigantic blunders" on the aero development side.
However word from Maranello is that the wind tunnel is now correctly calibrated and delivering accurate data and Turrini believes that Barcelona "will offer precise indication in this regard."