I have had both, and a turbo fox body, I will never go with a tvs/ whipple again for one simple reason HEAT SOAK SUCKS. they get hot Fast, even just cruising around town. The reason I sold my cobra was from the heat soak, being down 50 hp from the 640 it dyno'd all the time, unless it was just warming up was frustrating. yes the down low tq is great... but I don't miss it as much as I thought I would... my opinion.. centrifugal all the way