What are headers with injector lines?

Answer 1

i own a shop and these are made for cars or trucks that still have the smog pollution pump and controls on them you can hook the smog system up ,ad it will work properly on these type of headers,but that's what there for,good luck i hope this helps.

Answer 2

Those are for the Factory Air Injection Pump Smog System your vehicle has that must be hooked up to be emissions legal and for the engine to work correctly without any difficulties or problems etc.

Walt