Had mine in today with Chris at Dynatune, top bloke it has to be said. Results below. According to some Web search info, I calculate it to be around 290bhp @ the fly. Didn't reach the magic 300bhp but it's close enough for me just now. Think a better exhaust is in the pipeline too as Chris reckons the Toyosports are a bit on the restrictive side. Might opt for a custom true dual later this year.
Model: 05 DE gt with 70k on the clock
Mods: plenum spacer, Flyboy air box, K & N panel filter, Berks intake pipe, Toyosports exhaust, Japspeed decat pipes and uprev map
Dyno: Dynapack hub, done @ Dynatune, East Kilbride
BHP: @ the Hub 252.623
Torque: 249.136 @ 6100 rpm