injectors I really didn't understand what I was getting. But I found such a good deal on them that I couldn't pass them up. I figured the injectors in my Z were nearing the end of their useful lifespan and I would have the 555's sitting on the shelf for when I needed them. It wasn't until after I (we) installed them that I learned about the fuel requirements for higher boost, etc. and what I was really purchasing. Even now, my set-up is pretty unsophisticated with boost jets and stock boost gauge, but I like the margin of safety my larger injectors have conferred, and my car runs great!
