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  1. #1
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    Best Lower Unit for 2001 Pro XB 250

    I have a 2003 Allison Grand Sport with a 2001 Pro XB 250. What is the best performance lower unit to run with? Currently, I run it with a 26 prop.

  2. #2
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    You need a Sportmaster or a coned Torquemaster. The latter could be a bit faster, but you are at the mercy of how well the nose cone was installed.

    I think I would go with 1.62 gears.

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