cylinder head upgrades
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    Manic Mechanic Get II Head vs Pirate Cylce's Aftermarket Head

    I would like to consider upgrading my head on my Grubee GT-5 and was wondering if anyone has tried either of these heads and what their experience has been? I'm looking for a little extra power and speed, and wondering if it would be worth it over the regular china slant head on the Grubee...