it all depends on what turbo you want, what size, brand, etc....most turbos go for about 600 bucks AT THE LEAST, other brands and places sell them for more, if your upgrading your turbo and you buy it from a place that is specifically dealing with dsm's than you prolly wont need anything else as long as you get the right shit, a friend of mine put his new turbo on his stock manifold and his upgraded downpipe worked with the stock and the bigger turbo, if your planning on running more boost you might want to also think about an upgraded intercooler and fuel system........