Building your own nitrous kit
 

This guy seems to know the ins and outs to building your own kit part by part. To me, it seems like it would be too much of a pain versus buying a kit that comes with everything right out of the box. But what would the costs be like when comparing a DIY kit versus a piece by piece one?



http://www.nitrous.info/car-nitrous-system.htm

DIY almost anything can range from more expensive than store-bought to literally free, from a death trap to safer than store bought. Knowing what you're doing and where to shop helps.