With my aircharger, they sent paperwork in which their test vehicle showed a 15.26hp difference at the rear wheels @ 6000 rpm, in 3rd gear.
Stock was 263.45 and was 278.71 after the intake kit installed.
Ordered 4/26/05. Picked up June 11, 2005. 05 Mustang GT Premium Coupe, 5spd, Performance White, with red accent leather (ICAP), Shaker 500, IUP, active alarm, side airbag, spoiler delete. MODS: Baltimore Street Mods 10' red stripes and red rocker stripe. window tint. K & N aircharger. Pony Package fender emblems. Added 18" Polished Alum. Bullitts Hurst comp shifter