It might not be in your case. For me, I run a pretty hot SRT8 cam, headers, no cats and the Varararam cold air and a 3,000 rpm stall converter. My truck would not run without a custom (hemifever) dyno tune for 93 octane. Raised shift points to 6,200 rpm
I'll bet if you got with (hemifever) and had your Ram tuned with a Diablo tuner, you would be grinning pretty hard. Why, Diablo stopped making the Predator, that's a mystery. But I'm old. My 93 year old dad, asks WTF did Ford stop making the Model A for?