I bought some 42 lb injectors and I had put them on my car for the nitrous kit I was going to install. I have decided to go wit heads/cam instead. I only turned the car over once, so, they are basically new. no o-rings though. I want 275 cash in hand or 290 shipped. They flow 42 lbs. per hour at 35 psi. pm if you want more info or pics