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Discussion Starter · #1 ·
i took my stock can off and modified it with a pro circuit dirt bike silencer. Now it runs real bad, do i need back presure or what? [:(]
 

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ya u deffently need some back pressure.i suggest just getting a name brand can for ur sled.but if u r really determanded to do this i would put some baffels in it or weld a washer over the end.but likee i sed befor i would just buy one and not take the chance of ruin ur motor.
 
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