I am curious if the 944 Na and 944s exhaust mating flanges and positions are the same?

 

I don't know first hand, but I have heard they are different. If you're going to use an S head for a 951 project, you have to have both S manifolds, and modify the crossover to fit.....I was told.

 

I understand using the manifolds. My current crossover is designed to be used with Na headers.

 

Well, right... That's what I meant. The S headers are different than the 951 headers (not sure about the NA headers). "You need both manifolds" = intake and exhaust.

Sorry for the confusion.

Try contacting BoostFeen. He just had an S head and manifolds for sale (Not sure if he even sold them). He might be able to give you a real answer.