2000 Forester with rusty fuel rails. I haven't seen this problem before on early EJ22s. Can this become a dangerous situation(rust thru and spray fuel all over and catch on fire?) How easy is it to replace them? anyone seen this problem before?

Thanks

Pictures of the rust? I can't imagine it's more than just surface rust. I don't think there's a steel thing in my engine bay that doesn't have surface rust, same goes for any other car in the north east. I've never seen or heard of a fuel rail rusting through.

I haven't heard of the fuel rails rusting through under the hood. Sometimes some of the short lengths of rubber hose under the intake manifold get issues. I'd say far more likely that the transmission cooler lines (if auto trans), rear brake lines, and fuel lines near the tank before they come up under the rear seat will all rust out first.