I've been looking for a fuel pump and injectors for my vortech build and have a guy contact me locally with a set of 60lb SD injectors. He said that he bought them from the previous owner 3 years ago who only put roughly 500 miles on them. My question is, what and is there a shelf life on injectors? He said he has had them stored in a climate controlled area in a plastic baggy. If they were never used, this wouldn't be an issue, but I've read a few things saying injectors could go bad if not cleaned properly before being stored.