Originally Posted by Donny Brasco
I haven't seen any other dyno graphs from Cobalt SS/TC owners besides what is on Hahn's website.
That is weird.
I am looking into each and every option, cost notwithstanding.
That's because most tuners won't guarantee certain results because it all depends on the car, what your performance vs reliability goals are, and where you are located.
That reminds me of those gnarly intake power increase numbers, where they "guarantee" a certain number, but then (as an example) one of us installs it and actually has a loss across the whole powerband.