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.