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Hpi Pro 4
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11-07-2004, 10:00 AM
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Aurra Sing
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Join Date: Aug 2001
Location: Santa Clara, CA, USA
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I have ran mine with the stock ball cups for a few races, a little slop, they are still fine with me. All ball cups wear after a few races, you might just be used to the tight fit of the RPM cups.
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