5 Star and Banks made their reputation fixing the old V10s that were seriously under-tuned by Ford in the early 2000s. The V10 was capable and strong enough to generate a lot more power without compromising it's longevity and over the years Ford realized that and steadily increased the horsepower. Nowadays, "tuning" has nowhere near the results as before as the engines now come from the factory "hopped up". You will still see some benefit but nothing like the big increases the older motors experienced with the "tunes".