It's also interesting that the peak HP is around 5300 rpm on that dyno and then it drops off. That suggests to me that it's running out of air up top. I bet a less restrictive intake would make a lot of difference.
2015 BMW M4 Alpine white/black
2011 Nissan GTR Red/black - HP Logic tune/midpipe
2013 BMW X5 50i M-sport M-performance Alpine white/black
2011 BMW M3 convertible Jerez black/beige
Gone but not forgotten: '12 X5M, '07 AM SuperVantage, '05 Boxster S, '01 BMW M3,...