Ever since I got my STi I've been searching the internet for anyone that is making "go-fast" parts for it. All the big names have been very un-impressive. Names like Cobb and Vishnu have not come out with anything as far as I've been able to tell. The other day I stumbled on Xcceleration.com and it looks to be a very large Subaru only based company. They have a '04 STi power package that claims roughly 430hp/455ft-lbs of torque/on 91 octane fuel. They also have a dyno graph to show the results of their kit. BTW those figures are flywheel horsepower and torque. If anyone is interested they can go to Xcceleration.com and check it out. Please reply and let me know what you all think of their kit. From what i've read I am very interested in buying it.