COBB has released v2.00 Maps for the R35 Nissan GT-R include proportional gain boost which offers RPM dependant boost control system and offers a big gain in GT-R performance. If you have an Accessport, download the new maps, and gain the extra top end that the new boost control offers.
New v2.00 Off-The-Shelf Stage1 and Stage2 maps are available for download from the Nissan GT-R AccessPORT Map Database. For the first time, Cobb Tuning is offering specific maps for each major world market, including: Australia, East Asia, Europe, Gulf Spec, JDM, South Africa and USDM. To accommodate global fuel variances, every map in each region is available for 91, 93 and 100 octane as well as 95, 97 and 102 RON.
Source: Cobb Blog