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74.4 crank and 98mm P&C right? That makes it a 3.365 or something close. Not a true 3.4 anyway.
I know Ralph went to headers and was thinking a Monty mufler at one point for better flow. His is a true 3.5. I'm sure he'll answer.
Not the cheapest answer but I thought the best to get the most out of my engine. If I didn't have to pass any harsh admissions (my CIS 3.4 passed WA emission tests with a 2/2 Dansk and SSIs) I would backdate to SSIs and a 2/2 Monty. ( I also have a new-unused 2/2 Monty for sale)
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