These are B-code injectors modified by Full Force and probably have around 10k miles on them at the most. At the time i bought them they had all the latest and greatest fuel and oil side mods, not sure if there's bigger and better stuff now or not. There is absolutely nothing wrong with them, i am just stepping down to 250/200's since the truck is a DD now. When i get my 250's from Casserly these will be pulled and shipped to him, re-oringed and flowed before the new owner gets them. It could take up to a week or 2 before i get my new injectors, so if you are in a hurry for injectors then DO NOT buy these. I am asking 1600 and i need your cores.