Im not sure. I'm betting 375ish is more likely. I watched a show on the cammer and they made (I think) in the 425 range, but they were high-rev power makers and they had to tune the hell out of it to make that HP...even those engines are sold without a warranty for racing only. I have a feeling that they will not put out an N/A 400hp motor because of 1 - they have to warranty them and 2 - it will likely need to run on low-octane fuel.

Now, if they step up the fuel requirements and actually give it some compression - and cam it to make some low-end..who knows?