Borla drone eliminated in 20 minutes for 20 bucks
#16
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iTrader: (2)
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I just ordered these, and should arrive this week
(Sold and shipped from Amazon Prime) so hopefully I can install this weekend and report back on sound/drone since my car has headers, cat back Borla, AFE filter/JoeZ and high flow cats. BLKLBL- for sharing this info and did you ever try to contact Borla about their Venturis to reduce drone before trying this option?
![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
#17
Pole Position
Thread Starter
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I just ordered these, and should arrive this week
(Sold and shipped from Amazon Prime) so hopefully I can install this weekend and report back on sound/drone since my car has headers, cat back Borla, AFE filter/JoeZ and high flow cats. BLKLBL- for sharing this info and did you ever try to contact Borla about their Venturis to reduce drone before trying this option?
![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
#21
Pole Position
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I just ordered these, and should arrive this week
(Sold and shipped from Amazon Prime) so hopefully I can install this weekend and report back on sound/drone since my car has headers, cat back Borla, AFE filter/JoeZ and high flow cats. BLKLBL- for sharing this info and did you ever try to contact Borla about their Venturis to reduce drone before trying this option?
![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
#23
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I'm guessing there will no power loss with these and just enough back pressure being created in the chamber of the Borla mufflers to create some destructive interference to cancel out some droning frequencies?? The other opening in the mufflers will be pushing out the majority of the exhaust flow and changing the tone/frequency coming out resulting in a more subdued less booming exit/sound????
#24
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iTrader: (2)
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Yes, I tried this last week. We just stuffed some rags on the bottom tips on both mufflers, for a moment and found that it suppressed the sound on start-up and revving a little bit.
#25
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iTrader: (2)
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I just received mine and put these in. Based on a quick assessment using a decibel meter iphone app (and by no means should my review be official in any way) the sound went from 99db to 94db with the silencers installed. For the price, these aren't bad and are worth it to me so far, and keep in mind, I have headers, and hi-flow cats installed. I can update this thread with additional info once i drive the car more but that may be a while as I only drive the car about 50 miles a week.
#26
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Awesome thanks for the update!
#28
Pole Position
Thread Starter
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I just received mine and put these in. Based on a quick assessment using a decibel meter iphone app (and by no means should my review be official in any way) the sound went from 99db to 94db with the silencers installed. For the price, these aren't bad and are worth it to me so far, and keep in mind, I have headers, and hi-flow cats installed. I can update this thread with additional info once i drive the car more but that may be a while as I only drive the car about 50 miles a week.
-- these are adjustable, if you want to quiet yours down down more, maybe re adjust the end piece so that it blocks off more of the holes, and see if that helps
#29
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iTrader: (2)
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I checked mine today and with the DB iPhone app, my cold start went from 82db to 72db. Good to hear you have had a reduction also.
-- these are adjustable, if you want to quiet yours down down more, maybe re adjust the end piece so that it blocks off more of the holes, and see if that helps
-- these are adjustable, if you want to quiet yours down down more, maybe re adjust the end piece so that it blocks off more of the holes, and see if that helps
#30
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I'm guessing there will no power loss with these and just enough back pressure being created in the chamber of the Borla mufflers to create some destructive interference to cancel out some droning frequencies?? The other opening in the mufflers will be pushing out the majority of the exhaust flow and changing the tone/frequency coming out resulting in a more subdued less booming exit/sound????
Want to reduce drone without power loss? Helmholtz resonator. Looks simple to the eye, but designing it is a different story.