repco or global auto spairs or similar place
it needs to be a 3wire sensor (assuming its for a skyline)
cyrus if he needs to pull it off the car to fix that. tell him hes a f*CKing wanker and go see a decent exhaust shop
yer my suspension setup needs a lot of tweaking and adjustment in other areas but for a start im too lazy to pull the back seats out to adjust the damper rates