318 engine combos for 400hp

The dyno they use is a bit "happy" and has a correction factor that adjusts about 4-5% up using the superflow software. The same engine on a DTS will come in the same percentage lower in HP. SF = 400hp DTS = 380-385, but it's the same engine. Hmmmmm????

On most dynos you can actually puff your hp numbers with the correction factor parameters.

I've seen engines run on both style dynos and the cars ran at the track, mph/weight, more consistent with the DTS numbers.

Dyno numbers are like flow benches, everyone seems to be impressed with big numbers. But, those big numbers don't always translate to the performance they imply.