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First off to all those who like to say it.....i already searched and found nothing.. ..now onto my question.

I've been looking at mufflers and i was wondering what is the difference between single wall and double wall? any advantages and disadvantages would also be helpful?
the two mufflers i am looking at are relatively the same in looks and features except for that stated above....and the price. thanx for any help

 
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that's a good question ill stick around and wait for an answer too haha ;\

 
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anyone know????

 
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im pretty shure double wall is supposed to have a lower sound, and less heat transfer to the bodykit etc. that just guessing though