I said that because I don't know wtf nitrous does to a engine. The guy basically lied about everything on the car. He said it was the original trans & it shifted good, but it went out in 2 weeks & it was replaced before. He said it was a bad o2 sensor, but it ended up that the cat was replaced with a big ass resonator & the o2 sensor was gone. So IDK wtf to do now. I am kinda pissed off I put more work into this car & I find more s**t f***ed up with it. Sorry for my language guys. So I really don't know if the 1st or 2nd owner of the car had nitrous on it. because I am the 4th owner. Oh & UR LOSIN We posted at the same time lol.