Resonator Delete - How loud does it get?

[allenyao09]

Hello!

I've had my stock RS6 for almost 1 year and a half and I found the exhaust sound really underwhelming. I've been thinking about upgrading the exhaust without spending too much money. But the thing is this is my wife's daily driver and she prefers it QUIET.

I'm trying to convince her that the resonator delete only makes the exhaust louder with the valves open and no noticeable difference with the valves closed. For those who had fitted the resonator delete, is this true? If it does make the exhaust louder with the valves closed, by how much? I don't want to upset my wife and have to change it back lol.

I'm assuming it won't make it much louder with the valves open either, right? I heard it wouldn't make much difference without replacing the stock downpipe. As I'm not running on any tunes yet, I won't be bothered to replace the DP.

A side question, I found CTS turbo also makes the resonator delete for C8 RS6. How's that compared to the Redstar? Has anyone tried this yet? It's slightly cheaper and is better looking imo. Sound wise I couldn't tell much difference.

Your inputs are appreciated. Thanks!

[Demoness]

I noticed no difference with the valves closed and about 20% louder with valves open

[NBPIH45]

I think you look for the video on youtube and watch it.

[Hkc]

I have redstar resonator delete. No difference with valves closed, with valves open it’s louder, not too loud, I think it’s perfect and how it should have been from the factory.

[carguyshu]

I removed all 3 for $400 at my local muffler shop. Same as stock with closed & definitely louder when open, but most of the extra noise is during the shifts & start up. You would never suspect it wasn’t that way from the factory. My blackwing is still a lot more vocal stock vs the rs6 with all resonators removed.

[allenyao09]

I think you look for the video on youtube and watch it.

Thanks! I've watched some youtube vids and that's where I learned the resonator delete should have no difference with the valves closed. But my friend warned me that it may potentially cause droning at a certain rpm with the resonator deleted. Just wanna double check with the forum members to confirm.

[allenyao09]

I have redstar resonator delete. No difference with valves closed, with valves open it’s louder, not too loud, I think it’s perfect and how it should have been from the factory.

thank you! that's very tempting!

[allenyao09]

I removed all 3 for $400 at my local muffler shop. Same as stock with closed & definitely louder when open, but most of the extra noise is during the shifts & start up. You would never suspect it wasn’t that way from the factory. My blackwing is still a lot more vocal stock vs the rs6 with all resonators removed.

Did the muffler shop just cut the resonator and weld another section of the exhaust pipe? That a great bang for the buck! But I will still go with the redstar resonator delete replacement. Still wanna make sure it's reversible just in case.

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I noticed no difference with the valves closed and about 20% louder with valves open

that's exactly what I need. Thank you!!

[carguyshu]

Did the muffler shop just cut the resonator and weld another section of the exhaust pipe? That a great bang for the buck! But I will still go with the redstar resonator delete replacement. Still wanna make sure it's reversible just in case.

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that's exactly what I need. Thank you!!

Yes they just cut them out & welded in a piece of stainless pipe. Red star only deletes the front 2 resonators & does nothing for the 3rd one. You won’t get as much sound increase by going just red star & it will cost you substantially more. It’s also supposedly a gigantic pain to put them on.

Cutting the old ones out is reversible as you can just keep them and have them welded back in. With the valves closed the rs6 is still by a massive amount the quietest car I own. You won’t want to reverse

[MattF]

Did the muffler shop just cut the resonator and weld another section of the exhaust pipe? That a great bang for the buck! But I will still go with the redstar resonator delete replacement. Still wanna make sure it's reversible just in case.

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that's exactly what I need. Thank you!!

You can just have them welded back in.... so it's reversible

Matt

[allenyao09]

Yes they just cut them out & welded in a piece of stainless pipe. Red star only deletes the front 2 resonators & does nothing for the 3rd one. You won’t get as much sound increase by going just red star & it will cost you substantially more. It’s also supposedly a gigantic pain to put them on.

Cutting the old ones out is reversible as you can just keep them and have them welded back in. With the valves closed the rs6 is still by a massive amount the quietest car I own. You won’t want to reverse

The stock exhaust has 2 mufflers (1 for each exhaust pipe) at the front section after the DP, and 1 muffler at the center. Those are the ones removed by the resonator delete. Is the 3rd muffler at the very end of the exhaust? I wonder what it looks like after it was removed. Also thanks for the reminder that they can be welded back on.

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You can just have them welded back in.... so it's reversible

Matt

Thanks for the reminder. I will check out the local muffler shops.

[Tengorazon]

I also did the muffler shop option. There is a video where a poster even asks his wife if she thinks it’s too loud. I think it’s perfect. Sounds stock quiet until you put it in RS mode, then the loud fun happens.

[spetsnaz27]

Like others with Redstar res delete have said - zero added sound with valves closed


Sent from secret KGB Bunker

[allenyao09]

I also did the muffler shop option. There is a video where a poster even asks his wife if she thinks it’s too loud. I think it’s perfect. Sounds stock quiet until you put it in RS mode, then the loud fun happens.

Did you remove all 3 mufflers as well? I think I watched the same video as you described. That's where I got this idea from.

[Tengorazon]

Did you remove all 3 mufflers as well? I think I watched the same video as you described. That's where I got this idea from.

Yep, I started with just two, but that wasn’t loud enough, so then I had them take out the suitcase one and that was perfect.

[AstleyJ]

I did Redstar and agree with valves closed it's the same. It's MUCH better with them open. Still may not even be as loud as my wifes SQ7 for day to day driving.

[allenyao09]

I did Redstar and agree with valves closed it's the same. It's MUCH better with them open. Still may not even be as loud as my wifes SQ7 for day to day driving.

Thanks! Good to know. Why would it be not as loud as the SQ7 thou? They have the same engine right?

[extrabolts]

I'm the OP who tried this and made this video

https://youtu.be/6PbK1WbXfZE

Wife approved

[Shawn@PacificGerman]

I would say in most cases the resonator deletes sound the same regardless of brand.

In regards to fitment and overall quality, we have been pleased with both Akrapovic and CTS Turbo.

Akrapovic:



CTS Turbo:

[two+2]

I'm the OP who tried this and made this video

https://youtu.be/6PbK1WbXfZE

Wife approved

Awesome vid, thank you. Really great insight between inside cabin and outside exhaust note perspectives.

[Corrado79]

I didn't realize there were others making resonator deletes beyond Red Star for these cars? Do Akra or CTS's allow for a bolt-in / easily replaceable experience?

[XLR8Performance]

I didn't realize there were others making resonator deletes beyond Red Star for these cars? Do Akra or CTS's allow for a bolt-in / easily replaceable experience?

CTS does offer a resonator delete for your RS6!
Here's a link: https://www.ctsturbo.com/product/cts...onator-delete/

I'd be able to get this for ya no problem, in-stock and ready to rip. You wouldn't have to pay tax, and if you are in fact in CA you wouldn't need to pay shipping on this either!

Let me know if you'd like some more info on this

[Corrado79]

CTS does offer a resonator delete for your RS6!
Here's a link: https://www.ctsturbo.com/product/cts...onator-delete/

I'd be able to get this for ya no problem, in-stock and ready to rip. You wouldn't have to pay tax, and if you are in fact in CA you wouldn't need to pay shipping on this either!

Let me know if you'd like some more info on this

What about the Akra one; is that available?

[Shawn@PacificGerman]

I didn't realize there were others making resonator deletes beyond Red Star for these cars? Do Akra or CTS's allow for a bolt-in / easily replaceable experience?

Yes they are both bolt in, plug and play, with no modifications needed to the car.

[AstleyJ]

Thanks! Good to know. Why would it be not as loud as the SQ7 thou? They have the same engine right?

I honestly couldn't tell you why they made the SQ7 sound so damn good. But stock SQ7 has a much deeper/louder exhaust note than the stock RS6. With the res delete the RS6 can hang again.

[F10TT]

CTS does offer a resonator delete for your RS6!
Here's a link: https://www.ctsturbo.com/product/cts...onator-delete/

I'd be able to get this for ya no problem, in-stock and ready to rip. You wouldn't have to pay tax, and if you are in fact in CA you wouldn't need to pay shipping on this either!

Let me know if you'd like some more info on this

I wish I knew about this one. The Redstar one was a nightmare on fitment.

[XLR8Performance]

What about the Akra one; is that available?

I don't see a resonator delete by Akrapovic available for the C8 RS6.

They offer something called a 'Downpipe/ Link Pipe Set' and this is a catted and resonated set-up (You'd need to tune for this)
The also offer their 'Evo line' exhaust, you'd have to pair this with their 'link pipe' and downpipe set, and the link pipe is resonated. But this option does delete the secondary muffler.
You would also need to tune for this Akrapovic set-up.
Here's a link to the Evolution Line System: https://bit.ly/3T4hYjK
Here's a link to the Downpipe/Link Pipe Set: https://bit.ly/3Cgy17g

[MermaidMan]

I recently got all 3 resonators removed and replaced with normal 3in 304 pipes at a local shop. The car is definitely louder at startup and the farts it makes while letting off and downshifting is noticeably more pronounced, but I’m not too impressed with how it sounds while normal driving. With valves closed it sounds stock which I can appreciate when I want to a comfier ride, but it isn’t noticeably louder with the valves open.

[TFarrell]

I would say in most cases the resonator deletes sound the same regardless of brand.

In regards to fitment and overall quality, we have been pleased with both Akrapovic and CTS Turbo.

Akrapovic:



CTS Turbo:

is that video of the akra their link pipes only or downpipes with their link pipes?

[Shawn@PacificGerman]

is that video of the akra their link pipes only or downpipes with their link pipes?

Akrapovic Link pipes only in that video. Factory catalysts and oem "sports exhaust" cat back.

[awdbiturbo]

I am curious how loud "free flow race DP's" with resonator delete pipes will be with the center resonator removed, Leaving just the rear mufflers?

[Maitre Absolut]

CTS does offer a resonator delete for your RS6!
Here's a link: https://www.ctsturbo.com/product/cts...onator-delete/

I'd be able to get this for ya no problem, in-stock and ready to rip. You wouldn't have to pay tax, and if you are in fact in CA you wouldn't need to pay shipping on this either!

Let me know if you'd like some more info on this

I had the CTS installed today, sounds great. I'd say 25% louder than stock. Looked like quality pieces.

[bwhip]

Redstar sounds like this with the valves open. When closed, it's as quiet as can be. Perfect for what I was looking for.

[awdbiturbo]

Redstar sounds like this with the valves open. When closed, it's as quiet as can be. Perfect for what I was looking for.

I already have race down pipes, cts res delete pipes. I am looking to remove the center resonator and keep just the factory mufflers

[doctorbullet]

With valves closed on a CTS resonator delete - does it sound the same as stock with valves closed? I know CTS and Redstar delete different resonators on the full exhaust, and Redstar with valves closed sounds like stock, but I haven’t heard anyone confirm the same with CTS. Thanks in advance.

[Maitre Absolut]

With valves closed on a CTS resonator delete - does it sound the same as stock with valves closed? I know CTS and Redstar delete different resonators on the full exhaust, and Redstar with valves closed sounds like stock, but I haven’t heard anyone confirm the same with CTS. Thanks in advance.

unfortunately I dont remember how it sounds stock with the valves closed. But if you are worried about this being too loud even with valves closed, don't. I drive with valves open 100% of the time and no one would think the sound isn't stock. I'd only be worried about this with downpipes.

[Benmh]

Cut mine out for $300. Sounds totally stock in comfort mode. In dynamic with valves open and on cold start there is a bit more bark but for sure nothing over the top - I would say it is what a stock sport exhaust option should have sounded like. Also you hear more crackles on the overrun when you let off the gas - sounds great (again, only with valves open).

[doctorbullet]

Thanks guys. That helps a lot. I’ve pulled the trigger on the CTS delete. Looks like a beautiful piece of kit, and easier to self-install than the Redstar.


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[Benmh]

Cut mine out for $300. Sounds totally stock in comfort mode. In dynamic with valves open and on cold start there is a bit more bark but for sure nothing over the top - I would say it is what a stock sport exhaust option should have sounded like. Also you hear more crackles on the overrun when you let off the gas - sounds great (again, only with valves open).

[oripaamoni]

I went the cheap route and got the resonators cut out and couldn't be happier! Sounds the same as stock with the valves closed.