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I had same question like you! X-pipe makes less sound than straight pipe. That's what i found out from research, auto couture, and kc muffler shop that I went to. My bro nobleman and I seached for times. If you ask how much diffenence, I have no clue. Sure we have better aggressive sound now than before. However, there is limit that our eisenmann race can make even after straight pipe. If you want louder than eisenmann + staight pipe, only answer will be tune and down pipe. All of these will blow away.
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