practiaclly brand new. ive had it for about a year and it works great. I have recently upgraded to a 351W with fuel injection and dont need this anymore. look up vids on youtube and the FAST webste to see how easy it is to use and install. burns cleaner and cold starts are way easier than carbs. no tuning experience needed comes with Throttle body, computer, harness, fuel pressure regulator, o2 sensor and installation and user manuals.