Of course, the chassis dyno is always the final proving ground for the performance evaluations we bring you. Philip Zotti's spankin'-new '12 GT (5.0/six-speed manual) is our lab subject this month, and the bone-stock Pony actually did well in its initial run on the rollers. (The 'Stang's 382 rwhp is among the highest rear-wheel baseline marks we've seen in similar Coyote-based tests performed on GTR High Performance's Dynojet.)
As we expected, we saw modest gains with each individual piece. However, as a whole--and with a custom 91-octane PCM calibration from Chris Jones of Blow-By Racing--our selected components really shine on Phil's stock Pony, surging it into the all-hallowed 400hp zone without a whiff of artificial air.