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U lose a couple pounds. And the muffler is now sstraight thru. The stock muffler is not straight thru. So with proper jettin. , I suppose it would offer better performance. of course I now recommend just buying a Briggs and Stratton muffler. CheAp
easy
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2009 Vitacci Elite 150cc
Custom shortly muffler
hi flo air filter
minor weight reduction
removed unnecessary hoses
larger Pirelli rear tire
1 Rockstar sticker.(adds HP)
59 mph GPS verified
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