Most of the Hennessy packages for production cars are so poorly thought out and grossly under tuned. In other words, they run like crap at the track, but seem just fine on the street.

Just think it’s all marketing and no bite. Lingenfelter is only marginally better. So much safe reliable power being left on the table just to get a Hennessy or lingenfelter badge.


I am very familiar and have fixed a few Cadillac CTSV Hennessy packaged vehicles.

In fact, my tuner tunes all of John Heinricy’s personal cars, they both worked for GM performance division until GM disbanded it when John left.


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