Yea, the MPKK and D1 tune is pretty damn impressive numbers for the 6cyl. Unbeatable value for money.
That said, you can also get a cheap ($3k) Dinan tune on the V8s for even higher gains. For the 2011-2013 50i, you can get 495hp and a monsterous 580lb/ft of torque.
I have to say, I love the...