Had 2 silvia s14. there a great car, try to make sure your buyn a jap and not a uk 200sx. Engines are real reliable unless your very unlucky. gear boxs are very reliable, apart from the 6spd on s15 can be a bit soft, usually i find if you buy a just in jap, usually you end up putting in a clutch fairly soon, the gasket between turbo and manifold has a habbit of disintegrating and turbo could even become loose and it will sound like a tractor, can be a bit tricky to do, allow 250 if its gone. very easy get power out off, turbo elbow down pipe, decat, adj pressure reg and an s15 turbo and you shud be not too far off 280 to 300bhp. Fuel pumps tend to give up, but good idea to get walbro pump in before it goes, if you buy i have a decat there for 80 quid if you want it.