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no muff to tuff

  1. Streetfighter Help Needed!
    im hoping to put an under-engine style exhaust on my cbr. how different are mufflers from different bikes. cause theres some out there that i like their cans. does a cbr 1000 can not work well on a 600? shour it be another 600? does it need to have come off a 4cylinder bike? will the shorter...
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