Can you also reccomend a good sticky tyre that would suit the car?

Go on a Subaru forum and look for the answer. Or look in your handbook

yeah right, like you have one lol.

14'' for a regular Impreza, 16'' for an STI. Go with pirelli tires.

a 205/45/16 is wat u want if the car is powerfull get a good brand with a high speed ratin a v rated tyre will do the job

l have 205/50/16 on mine, been recommended to fit yokohama
when tyre is need changing, have used them before with no complaints,but the choice is yours as is budget,you get what you pay for.

Check out tirerack.com

That will give you the factory tire size. Also they have a wide variety of tires for whatever you're looking for.

l will go with millionsofsubys on this. Tirerack.com is an awesome site. It takes a while to get what is going on, because it has so MUCH information there. You can put in ur car model & let them take over with recommendations. Once u have a few, be sure to click on ''survey results'' to see how the tire u r looking at stacks up. Within each type (such as ''All Season High Performance''), click on ''Show all tire in this category'' (or something like that) & u will see the list in order. If it fits ur car, the tire will me in bold type & marked with a bullet.

You can also read buyer reviews & filter the results by ur specific car, so u will see what others thought about putting the ''Brand X'' tire on their Impreza.

Here u go. l put in ur car & this is the ''Best Seller'' results page. http://tirerack.com/tires/CompareMostPop.jsp?autoYear=2005&autoMake=Subaru&autoModel=Impreza%20WRX%20Sedan&autoModClar=&sortCode=44950&width=205/&ratio=55%20&diameter=16&minSpeedRating=V&minLoad=S&search=mostpop&vehicleSearch=true&

If u want sticky. Maximum performance summer tires: http://tirerack.com/tires/tires.jsp?tireMake=Bridgestone&tireModel=Potenza+RE050A+Pole+Position

If u want all-season practicality. http://tirerack.com/tires/tires.jsp?tireMake=Bridgestone&tireModel=Potenza+RE960AS+Pole+Position

l would go with 215/45/r16 yokohama s-drive or toyo 888, the wider the tyres the better the turn!!!