Also if you get a 200sx with the sr20det in beware the most common problem with them is vvti rattle, its a light tapping between tickover and 1500 revs but quiet after that once the oil pressure picks up well till next time you start it

i had this problem mine got very bad to the point that is was a LOUD knocking

the sprocket is around £600+vat from dealer altho can sorce new ones from oz at around £250-£300 or just scrap it like i have but you will lose mid-range torque

If you would like to know more feel free to pm me
If you would like a nice example i would try the owners club www.sxoc.com