? on Donaldson Muff
06-29-2007, 01:36 PM
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? on Donaldson Muff
ok, got the 40" installed. Now I really don't care, but why is it that with my stock muff I never had a sooty bumper and now with the Don I do. I have no mods, is it because it is a straight thru muffler? may be a dumb ? and I probably just answered my ?. 
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