I've seen a small improvement, especially noticable on hot days. Before the kit, there was a BIG decrease of performance on hot days. There is still a decrease in performance when the hot Texas heat turns on, but the snorkel to the fenderwell has made the effect much less dramatic.
All in all, a nice little mod for 2 to 3 horses.... especially for 75 dollars
------------------
98 GT
Dyno-Max cat-back exhaust, 3.73 gears, Steeda shifter, Ford Motorsport Underdrive pullies, 87mm MAF and Roush cold air kit...