Hi Doug,
The later dual outlet exhaust manifold will give you an improvement, a header
will give more of one.
Raymond
--- Doug <dougfr@comcast.net> wrote:
> Old subject but need a little advise. I'm upgrading my '69 TR6 engine with a
> better street cam and porting, etc. Stock carbs for now. The original
> factory exhaust manifold is cast iron with a single exhaust pipe system.
>
> Would it give me improved breathing if I went to the 73-76 cast iron exhaust
> manifold with the dual exhaust pipe system or should I remain with the
> single?
>
> Doug Fr
> Sammamish, WA
> 69 TR6
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