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Old 21-11-2008, 14:34   #9 (permalink)
 Shire
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My brother had the twin backbox and at a later date added the intermediate pipe. It didn't make much difference in sound.

The sound will come mostly from the backbox and the oval is notoriously louder.

I have the Magnex 5x3 Xpower oval if you want to swap? I want something quieter
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