wondering wich exhaust manifold i have on my 91 cummins i hear there are two different manifolds anybody know how to tell the difference between the two????

 

as far as i know there is only one on all 1st gens

 

There is a 3 piece after market, but that is it.

 

I'm assuming you're talking about the '94 F350 with a Cummins in it. That in your Sig.

Without pictures, we'd need to know what year Cummins engine you're running. And that's assuming it's running the original manifold.

Post a picture of what you've got.

 

all 1st gens run the same pos stock single piece manifold butt it works i dont plan to buy a three piece untill i crack mine or melt it off

 

But his Cummins is in a conversion. It's common practice to run manifolds from another year truck to make things fit (2nd gen, 3rd gen, etc).

 

Its a 92 cummins with stock manifold, I hear there are 2 different manifolds for that year, just tryin to figure out if its true or not, im tryin to buy a different turbo and the people asked wich manifold I had, they said theres a h-3 and an h-4, manifold so now im lost, thanks for all th help.

 

who ever your talking to doesnt know squat!! haha
they ment to say t3 or t4 and no cummins that was in a truck came with a t4 manifold!
its a t3 turbo flange!
what kind of turbo are you looking at?