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2004 w900l rerouting exhaust

I was wondering if I would see any marked improvement in fuel efficiency if I were to reroute the exhaust on my 2004 w900l. I currently have the factory configuration which has the big muffler under the sleeper that then routes back forward to the dual stacks. Would it benefit me at all to put the y pipe directly from the outbound pipe and to the stacks, completely eliminating all that's under the sleeper?

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If it was going to make a difference it would be so small you wouldn't see the difference. I've spent a lot of time and money over the years trying different things to improve fuel mileage that Kevin has recommended and most of them don't do anything except lighten your wallet for you. Your biggest fuel improvement would be to say good bye to the W900

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James will be eternally grateful.
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