But what do you do when the manufacturer's horsepower data is widely recognized as wrong? I truly don't have a dog in the fight and could care less what the car is classed at so long as it is right.

There's a fair amount of data showing the car stock making 165 whp, some more. There's other data that shows this is correctable via the ECU, and even more than says it is not.

I'm lost on this one. The car needs to be in R, and it needs to be there at the right weight. So what do we do with such conflicting information?