I have an 07 sportsman 500 HO efi I found a fairly inexpensive way to customize my stock muffler and was wondering if it will effect the way the machine runs without doing something to the efi system. just lookin for some tips
There is a thread on this mod where each guy did there own variation of it. Some completely gutted, others took one or two baffles out, one guy added another j pipe, some cut the j pipe out covered the hole and drilled a hole out the back everyone going with different sizes. If i find it ill post it.
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