Just finished with the dyno test this morning. I have a 2006 GT 5 speed with no mods other than a Hurst Shifter. The elevation here in Boise, Idaho is 2850 ft. and the temp was 54 degrees. The dyno used was a Mustang MD250. The HP increase was 21.3 and the torque was up 13.3 ft-lbs. Also, the HP peak moved up from 5000 rpm to 5500 rpm. There were many positive comments about the look of the polished intake and the ease with which you could attain these gains. The advantage of this system for me, is the ability to still run Chevron (not the local no name cheapo stuff) 87 octane and not mess with the ECU programming. The polished intake is very impressive!