okay i currently have a B16a2 in my car at the moment and im planning on taking it out too sell it!, Well anyways my ? is the downpipe on my stock headers are welded on too my cat so i cant unbolt it at all its stuck on there unless i cut it off. Can i use the same B16 downpipe off my stock headers too put on my LS when i put it in?Will it bolt straight up or not? thanks LMK

 

yes , you can even keep the b16 manifold your motor now and bolt it to the ls