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I've wanted to do a chambered muffler now for a long time. I haven't had the time to really play around with it.
 

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With something that specific, would a tuned mass damper work well enough? I know BMW and MB use them. I'll keep an eye out for one labeled at 80Hz
 

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no, they get a mounted to a bracket that is attached to the exhaust, ill see if i can find one on a lift at work and snap some pictures.
 

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Yes something exactly like that. My understanding is a bit of both. It definitely helps with frequency transferred into the cabin but if that's changed then there will be an audible change to the exhaust note. To what effect? Not a clue, that's way above my education and understanding. All I know is without them on some cars there are unwanted harmonics audible in the cabin of the car.
 

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Like I said, if I have one come in I'm going to take some photos. Get some references. Mercedes stamps it with part numbers and frequency data right on it. Unfortunately it's not provided in the parts catalogue. I think there is one or two in the 80-90hz range there's on in the 100 something range. I wanted to do it vs the helmholtz resonator I added. It's works but it's not optimized and it's REALLY annoying outside of the car at that frequency. I vaugly remember 107hz, it gets super tinny sounding outside of the car. That makes sense though since it's sound bouncing off of stainless steel pipe reflecting and multiplying in a way.
 

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Had a couple cars in finally with some dampers on it.
A2514910347 --66HZ
A2514910447 --63HZ
A1644910047 --48HZ
A1644910147 --36HZ
A1644910447 --90HZ
A2034910347 --74HZ
A1644910947 --92HZ

also good p/n are
A1644910847

No idea what the hz stamps are though, still doing some digging through that.

Also the bolt for them is M8 p/n A0019904800

I will update this post as I find the specs on more of them. There are ALOT of valid part numbers for these.
 

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Looks good. The nice thing about the clamp on piece is you can move it around the exhaust to really dial in the benefits of it, like you mentioned earlier. Curious to see the results, I saw BMW makes a 109Hz, close enough to the 107 I need to go ahead with trying.
 

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Yeah it's about 10 psi. That being said I was under the impression that you use whatever dipstick matches the block. Ie: k20 is k20 dipstick and k24 is k24 dipstick, regardless of the oil pan. That could change the overall volume you need but the difference is 19mm like the deck height.
 
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