So I've been looking on the H&S site and found that the race tuners with 4 tunes are no longer available. And from what I've gathered, the street tuners only have 2 tunes. What do I need to get in order to have the 4 tunes with the DPF crap taken off? Do I HAVE to buy the Race tuner, or will the unlock codes add the other runes and dpf stuff. And what's the difference in the sulfur unlock code and the normal one? With the sulfur it says you have to apply and stuff, has anyone done this?