Standard 5 speed in the foz was ~2600rpm for 100km/h with correct sized tyres.
04 6 speed is 2800rpm with the sti speed sensor and wrx sized tyres (when I have the foz tyres on it still says 100 at 2800 but I'm doing around 107-108km/h)
EDIT: 5 speed is 4.44 and 6er is 3.9