I am thinking of adding headers in my upcoming head swap. If I currently have just stock LG4 exhaust...manifolds on back...single cat. Will the headers bolt up? Or will I be replacing the pipes as well.

I am NOT talking about performance issues...I understand I should put a better cat-back and all...just wondering whether they bolt up without...

Time issue mostly...

Any and ALL comments appreciated...

Jim

 

you are going to need a new y-pipe.
the manifolds are shorter than headers so, the y-pipe for manifolds are longer going "up" into the engine bay from the bottom of the car. while the "y" for headers is reletively straight and the ends stick closer to the oil pan.
biker