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      04-20-2015, 01:19 PM   #36
ryank382
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Quote:
Originally Posted by 1SerieStud View Post
No problem! Even though the pipes with perforations are replaced by solid pipes for a straight-through design, the density of the muffler unit plus the fiber glass continue to absorbe the resonance, which is what translates into drone. Also, there is a second set of unperforated pipes that most people leave alone, and I'm sure they do their part in the muffling process. I personally had the fiber glass put back into the chambers after the piping was replaced; some people choose to leave it out, as apparently there is enough material to compensate for resonance - I didn't want to gamble with this as I can't stand exhausts that drone and the fiber glass weighs next to nothing and is easy to push back in.

Straight pipes, and even some exhausts that have mufflers (smaller ones) have a tendency to drone in the lower rpm's.

I hope this helps!
Definitely helps thank you. Do you mean that sound still escapes from the unperforated straight pipes? i also forgot about the first small chamber as well lol
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