I've seen a couple of those, depending on the maker some of those rails don't have much of an area for fuel capacity. I wouldn't run those with larger injectors. the ones I am making have a good sized pocket. I will be installing 1000cc injectors so I figured it wouldn't hurt. I can also make people custom rails if needed, I might be running a -6AN feed on each side with a return in the middle on a customers car with 1600cc's full drag car. I haven't decided if were going to be running two rails with staged injection or just 4 large ones.