2.8L Exhaust Manifolds (Page 1/1) lyleap-gmc AUG 01, 09:31 PM Hi, I have several cracks in the front exhaust manifold. I know they can be repaired, and at the same time the can be ported. My question is are there any cast iron exhaust manifolds that can be used on the 2.8L? Thanks to all, Lyle