We are in a quandry about the correct exaust manifold for our GEN 3. We read the stock ones crack, the stainless ones crack, the iron ones are heavy... which way to go?
What works, what lasts and what about performance?
...Chrissi

I assume this is for a turbo version of the gen 3.
Did Greg Richter say his off the shelf  after market HKS TO4 turbo 
manifold cracked?

The 1989-92 stock Mazda cast iron turbo manifold does not crack in automotive
service, it will fit the gen 3 and it is not that heavy as I recall 
because it is small. See the picture below.

If you can afford it Inconel is the ultimate way to go.

Performance does not seem to be that big of an issue. The turbo
is capable of generating way more power than the turbo and the engine
can tolerate for long periods of time. People have got 800 HP out
of a 13B for drag racing with a simple turbo exhaust manifold.

The big question we have now is; how much boost can you run continuously
and for how long? Greg is our guinea pig.

We discussed this for years off and on and it is all on the CD.

Paul Lamar
 
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