GEN 2 COBB vs Hennessey, why does Hennessey show larger HP gains?

Xtinct said:

I am very familiar with the crap that Hennessey puts out. I am also aware of the great reputation and support from COBB. But what I am curious about is why the final HP output numbers from Hennessey are at 600HP vs COBB is closer to 500HP.

I certainly plan to do the install myself and since Hennessey does not support or sell just the power package, I have not been able to really determine what they are adding that would justify the power gains they are claiming. I realize they add an exhaust, but in speaking with COBB they mentioned that would not have much of an impact with their tune.

Does anyone know what is being done differently to show 600 HP from Hennessey?
Or is this just more fluff?
I am curious if anyone has a nice kit that would get you to 600+ HP?

https://cobbtuning.atlassian.net/wiki/spaces/PRS/pages/725155894/Ford+F-150+Raptor+Map+Notes

http://hennesseyperformance.com/veh...ord-f-150-raptor/velociraptor-600-twin-turbo/

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Gsteve said:

Anyone who buys anything from H is a idiot

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Truckasaurus said:

Hennessey is fake news. That "600" package originally came with upgraded turbos. They quietly removed them from the package but left the price and the power ratings the same.

Stay away. Use a reputable tuner.

For the avoidance of doubt, Hennessey is not a reputable tuner.

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Roc Nichols said:

Why don't you call Hennessy and ask, can't hurt. I do believe they provide WHP on the chart. They did on mine.

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