I have the car apart and am installing the Hooker Shorty headers. I ran into a problem when trying to hook up the y-pipe that came with the headers with my stock cat. How did you guys fix this. Is something missing.

I also ran into a problem with the AIR check valve bolt. The stock one is too small. Should an adapter one have come with the headers? I need help fast.

 

Never mind about the y-pipe issue. I'm just going to weld it on.

Now I need to know what size fitting that I need for the AIR pipes on the headers. Can anyone help me?????