| There are a couple of different combinations used on the 74-78 z's. If there are any doubts or questions feel free to send us an e-mail or call us on the phone on what you need. We can figure it out for you. This particular hose is used on most cars that have factory AC. It connects the manual valve to the vacuum valve and it is a U shaped pre formed hose. Uses 1 per car. This hose is used on all 77-78 z's with AC, and many of the 75-76 cars depending on the mechanical valve that is used. Last update 01/10 | 
