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Old 05-29-2014, 11:44 AM
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Grinder
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Originally Posted by Luís Cortez
Hi Mr Uriah

Please give us your opinion about the O.S. 2101 .21 Mod and unmod engine . Have you test it? How does it go?

Thks in advance.
The modified engine is very fast. The stock engine is pretty good too. The mod has very good bottom end power, and a lot more top end than stock.
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