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 Posted: 07-25-2019 01:17 am
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Esprit2

 

Joined: 05-01-2005
Location: Minneapolis, Minnesota USA
Posts: 573
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 I don't know which cast manifold was used on the JH, but the one used on the Lotus 907 was actually very free flowing and efficient. A good tuned length tubular header could still deliver more horsepower, but not much. On the order of 3-5 hp more. Not a big deal.

Regards,
Tim Engel