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I too am looking at a muffler modification. I really like the "cleaner" look of no bypass pipes and I think Charles has made the best home mod attempt so far by opening a small window and drilling the pipes. A fister mod sounds really nice but just too expensive and might as well spring for a little more and get a high performance exhaust system.
The only issue I see with the absorption style mod you are talking about is the need to repack it periodically. I would really like to know how long nineauto guarantees their work before a repack is required.
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