Tuning a car, and I mean real tuning is an art and a science. As with any art or science the proper tools are needed. One of the engine tuners best tools is a programable Air/Fuel Ratio unit. This AFR kit from Haltech is easily one of the best available. This particular kit is tailor made for the 350Z. So if you’re rocking a Z and its going haywire from all the stuff you bolted on to it, you may want to consider picking this unit up. 350ZMod.com has them on sale for under $250
