Jimmie Johnson quote from 2014...
"No rule change is cheap anymore. Because it’s not just a single piece or component to change; there is a domino effect that changes a lot of things," Johnson said. "I don’t know what to think to be honest with you. I like the power, power has been good for me. If you look at my Nationwide stats versus my Cup stats, I need power. I wish they would add more horsepower to the cars.
"We are all trying as drivers and members of this sport to say what is best for the racing," Johnson said. "If it’s reduction in power that makes competitive racing, I think we're all more than willing to get on board and to go down that road. But it’s not a guarantee in my opinion and an example was at Michigan (during a recent test session). There was a tire test, and they took the power out of the 21 car (of driver Trevor Bayne), and his center-of-the-corner speed went up almost 10 miles an hour than what an unrestricted engine was running at. I’m not sure those eight miles an hour through the center of the corner is going to allow us to run comfortably through the corner side-by-side. Now we’ve picked up a lot of speed through the corners, and are the tires going to hold up? Is the suspension going to hold up? It costs a lot of money to even put a tapered spacer on the car. We’re going to go and work to change all the internals to maximize the role that the engine performs. So I sympathize with NASCAR because there isn’t an easy way to go about things."
For me I am not a huge fan of lower power, it seems like they're going too low. If this diffuser can really mitigate the effects of dirty air, I don't see what the point is for 550 HP.