Exhaust manifolds

[MOPSD250]

Anyone know if I can use a 03 exhaust manifold on a 98 12v? Thanks

 

[Chevycummins]

can if you modify the ports the CR have round ports the 12v have square

 

[ride42]

Why would you want to?

 

[MOPSD250]

Damn thats right. round versus square. Not good! The only reason I was aking cause I can get a good deal on a 03 exhaust manifold

 

[ElliotB_16]

whats wrong with the one you have now?

 

[high toned sob]

well guys put 2nd gen manifolds on 3rd gen trucks right? But remember, the 3rd gen manifolds crack ALOT right at the collector, maybe that's why it's such a good deal? I've replace a bunch of those.
mike

 

[White Knight]

well guys put 2nd gen manifolds on 3rd gen trucks right? But remember, the 3rd gen manifolds crack ALOT right at the collector, maybe that's why it's such a good deal? I've replace a bunch of those.
mike

Yeah, but they are 24 valve 3rd gens using 24 valve 2nd gen manifolds. They both have round ports, 12vs have square ports.