I wonder how noticeable this gain actually was. Kind of annoying how they just kept repeating "noticeable gain" throughout the 3 segments. On the Saleen dyno graph it didn't look like much. ;squint: 2 horsepower?
The advert shows no clear gain in power only a paper dyno read out and you have to focus hard to see anything on the paper. Everybody (even from Callaway) are talking in carefully picked well spoken positive but non unrevealing words. It isn't a tell sell advert but not that far off if you ask me.