I know nothing about a 350 programmer but I used one for both a Vette and a Stang I used to have. I had nothing but problems with both programmers. Pinging, check engine light, etc. and very little performance gain. Plus if you have to take the cars engine in for diagnoses, you must first down load back to stock and then re-program when you get the car back (hassle). Maybe the Z unit is better but I will never screw with the computer again.jsl74 wrote:Does anybody have any experience or comments concerning reprogramming 350Z ECU? Is it worth the money? How much hp gain on average? Is it safe for the vehicle? I'm having some modifications done and the shop mentioned Cobbtuning AccessPORT for the ECU. THanks.