Advice for quieter setup
 

Hello,

I've currently got TD EL headers and overpipe and just today put a Perrin 2.5 Resonated catback.

I was surprised it was this loud, I love the tone up to the redline but the bassy noise / drone at 2-3k rpm is really unbearably loud for a daily driver especially on the highway.

I'm planning on switching to JDL 4-2-1 EL headers soon for unrelated reasons, I don't expect that will change anything to the noise.

I'm looking for some input on this. What can I do to quiet things down at low rpm? I've still got my stock front pipe on.

Thanks

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Do you still have the stock frontpipe? You might want to consider a different catback or move to an axelback instead.

If you still have the stock front pipe then I agree with w33. A catted header will tone it down but choke it more

:slap: pay attention - he said he did.

You're running low on "senior moments".

:sigh:

You pay attention too - he said he did - you're not old enough for senior moments - so it must have been a brain fart - :iono:

Not much you can do at this time. If you want with the stock front pipe, weld in an a better resonator.

I have the following exhaust setup:
JDL 4-2-1
Stock FP + Vibrant 1140 2.25" Ultra Quiet Resonator welded in and removed stock one
MXP SP catback

Perrin will have a bit more bass but if you want some sound clips of my setup LMK. I think I have pictures of how the shop welded in the resonator.

Would love sound clips as I have the same situation as OP. Been looking at small mufflers to weld in like you did with the resonator.

Let me work on these. Should have some time this weekend

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Yes please that would be great ! Also in your opinion would I have better results with the OEM front pipe + ultra quiet resonator or are there any aftermarket FPs designed for making things quieter ?

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The only one that's close is JDL ultra quiet FP and the hks dual resonated FP. Otherwise nothing else will beat the stock FP.

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I had the same problem. I went to a CSG Touring 86 Laguna catback and now I actually enjoy driving the car. No drone and just a nice mellow throaty tone.

Here is a pull from the car on the Dyno. I will have a cold start tomorrow and free revs after warm-up

https://youtu.be/jLbh0KAhoI8

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decatted stock header is always an option, benefits of catless but im sure its one of the quietest options, its what i run because i dont want an obnoxiously loud rice burner

I have a JDL 4-2-1 EL Header, JDL FP/OP Ultra Quiet Cat Combo and 2.5" Perrin Resonated Exhaust.

IMO it's the most tame, compliant exhaust I've ever heard. It'll get loud when you step on it but otherwise it's pretty tame.

https://www.ftspeed.com/part/ft86-qf...iet-front-pipe

Here's a drive by at like top of 4th into 5th at VIR

https://www.youtube.com/watch?v=73Io...nel=KyleHerbst

CSG Touring 86 will keep the volume down with ZERO drone.

You'll ONLY hear the exhaust when you're on-throttle accelerating. At cruise, you won't hear it with any cat, and barely heat it, catless.

I can confirm.


ACE A350
Stock FP
CSG 86 Touring cat back


I was honestly skeptical, just because I was jaded by previous exhaust/makers noise claims. The available sound clips on YouTube don't do the sound and volume justice in my opinion.

On my previous tune (ACE A350, stock FP and stock catback), it was quieter inside and outside the cabin. Confirmed with neighbors and the wife.

Currently working on my FlexFuel tune through Zach at CSG, it's even quieter now. This isn't due to break in or anything, as I bought the catback used.

For daily driving/cruising, you can tell you have a catback, but it's so subtle. You can actually have a conversation without trying to talk over the car. This wasn't the case when I just had the Ace A350.

When you get up the rev range, the volume is increased but it's nothing different tone wise from what you were hearing before while cruising. So it's nothing obnoxious.

I never had drone with either setup. If you are wanting increased volume without being "that guy" and not piss off your SO. You can't go wrong with it.

Can confirm as well that after all the research done in looking for a good quality quiet cat-back, this was quite a great option. I run A350 with stock FP and this cat-back as well. Cold starts can be slightly noisy, but I am currently working on toning that down with the tuner. But when I am talking noisy, I mean to me. Comparing to most exhausts out there, this is quiet. Hard to beat when you have a cat-less header. One thing I noticed that's interesting is it sounds a lot quieter before it ever gets fully warmed up. Once I get it warmed and start revving it out, I'll find that the exhaust tone has gotten louder overall, as if a valve was opened up. Nothing crazy though, definitely a good quality exhaust, love it.

Here is a cell phone clip. Hope it helps

https://photos.app.goo.gl/p6qeLPxBAsbtXmJe9

Here's my set up:
JDL UEL Catted

Invidia 2.5'' O.P
HKS Dual Resonated FP
Invidia Q300 Catback.



Doesnt get much quieter than this. It's a deep exhaust note, semi aggressive unless you're really sending it. It's mostly like a growl.



Insta/reddit:shrapnellbranches. I got a few exhaust clips that you can listen to.

Thank you all for the input.

I'd like to avoid going through the hassle of selling my current catback and switching to another one to be honest, plus I'm a little bit short on money right now.

I just went by a local exhaust shop and they claim they can eliminate 90% of the drone and low rpm noise by creating backpressure in the exhaust, a 1-2hours job for 200€. Something similar to a motorcycle DB Killer / silencer

It sounds like a quick and not too expensive solution, but I'm afraid I might lose some performance and perhaps some of the cracks and pops I can hear some time, what do you think?

I'm otherwise considering the Vibrant 1140 replacement to the stock FP resonator but I've read the difference would not be that big, maybe 10-20% noise difference

Might silence it, but it will probably make it sound horrible. As for performance, catbacks don't really add much HP to these vehicles, and what you'd probably lose will be hard to notice since gains are marginal. What I would suggest is if you still have it, switch to OEM catback, sell your current one, use the money for a different set up.

I have the same setup except with an Ace A350.

This thread actually prompted me to buy the CSG Touring86 exhaust, basically just to try it out.

My perrin 2.5" is not loud but after 50-60k miles seems to have a bit more drone than I remember at first. So why not.

I’m planning to do the same thing with the largest/longest inline muffler or resonator I can find. Either on the front pipe or the mid pipe since it’s longer and could fit a bigger silencer.

Here's my setup: JDL 4-2-1 Header, Stock OP/FP, Invidia R400.

https://www.youtube.com/watch?v=1XRtw833y3s

https://www.youtube.com/watch?v=x3lCW1tujhk

https://www.youtube.com/watch?v=e8r8O1jlzCY

It's very tame when cruising around town, but similar to your Perrin it can be a bit on the droney side at 125-130kph (77-80mph) in particular on the highway. I'll probably add in a Vibrant resonator like @jflogerzi did once my car is out of storage in the spring, or, sell the R400 and pick up the MXP/CSG Touring86.

a less common setup, Apexi header system quiets down most catbacks quite significantly. I believe @mav1178 posted some sound measurements and stated it even made the blitz nur-spec catbacks much quieter

It will fit in the FP. LMK if you want to see my placement.

I would try the resonator. From outside it sounds great.

Are you sure the 1140 will fit? My TRD cat back measures 2” and the 4.75” diameter body will be awfully tight.

This was my plan too but I don’t think much will fit. Maybe the magnaflow 10434. But that’s basically the same as the stock TRD resonator.

Let post a few pics of how I mounted mine

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@jflogerzi Just to give me an idea, how much of the drone would you say you got rid of with the Vibrant resonator ?

It's hard for me to compare. I feel most of my noise/drone was from the tomie UEL headers. I then switched to my JDL4-2-1 with the added resonator. Made things much better inside the cabin and going uphill at freeway speeds

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Might have already been posted, but does anyone have a soundbyte of a JDL 4-2-1 with the CSG Touring86? Been on the fence between that and the perrin

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Here's a quick & inexpensive solution in dampening the exhaust noise:
https://www.designengineering.com/fo...d-42in-x-48in/
https://www.designengineering.com/muffler-shield-kit/

I have a 2019 TRD SE exhaust on my FRS. Last October, we installed the Verus Transmission Tunnel Cover which has a direct contact with the midpipe. I noticed that the exhaust note became a little bit quieter as I could listen to the radio at a lower volume than before & even my family noticed it too. My theory was that the Verus cover was absorbing some of the mid pipe's vibrational energy that affect the natural tonal frequencies of the exhaust pipes. It made me curious to try & dampen the sound even more by wrapping the pipes with heat insulators that way, not only would I be addressing the sound, I'd also be managing the radiant heat as well.

Last weekend, we installed the DEI Form-A-Shield that has a thick layer of basalt thermal barrier material glued onto aluminum along the sections of the front pipe & the mid pipe as it affects the cabin heat esp. in the summer & some portions of the FT86SF uel catted headers (we didn't have time to enclose it fully like a heat shield). I was planning to wrap the resonator too but we didn't have time to do it. Nevertheless, the heat shield on the mid pipe significantly muffled the exhaust note! It sounded more of a muffled bass. Before, I could only hear the exhaust when I'd open up the throttle. Now, I can hear the engine more (sound tube's deleted) & so much lesser of the exhaust. It's like moving from Invidia N1 to Q300.

I wish I had a sound level meter to measure how much noise was muffled by insulating the mid pipe alone. I can imagine that it'll even have more impact when the resonator is wrapped too.

https://lh3.googleusercontent.com/bX...-no?authuser=0
https://lh3.googleusercontent.com/ax...-no?authuser=0

Keeping an eye on this thread. After installing Ace a350 I'm getting some drone with stock FP and perrin 2.5" resonated. It's probably an exhaust leak as there is also an abnormal amount of smell, hopefully that fixes a bit of the smell and the droning. Otherwise I'm kinda interested in the CSG touring.

updating previous post: I just swapped out Perrin 2.5 resonated (with a bunch of miles on it, probably ~75-80k) with a new CSG Touring -- it's a lot quieter and less drony.

My perrin 2.5 developed a bit of drone this year (or, more realistically, finally started to bother me a bit).

I've only driven the car once since install but it's noticeably quieter and more crisp. My only complaint is trying to get the tips lined up with the bumper haha.

I'll try to get some video and post, though I think we all know that cell phone videos don't capture it very well.

Definitely make a video if you can. I got my perrin 2.5 (very) used, no drone with OEM manifold but I think my problem is the gaskets. Glad to hear the csg touring worked well with you, for me the perrin has perpetually misaligned exhaust tips so I guess I'm used to it. they're non-adjustable too as far a I know, sucks.

Yeah mine was always a bit crooked, too, though I installed one in a 2017 a few weeks ago and managed to get it perfect.

I'll try to snag a video tonight.

Update to my previous post:

Retightened all bolts in the exhaust from frontpipe to midpipe. Despite reusing the midpipe to S pipe gasket, the exhaust smell is mostly gone and the drone has been all but eliminated. the loudness is PERFECT. When I bought the perrin resonated I had a singular goal, to buy catless headers afterwards and have the sound level right in the middle. With stock manifold, the perrin sounds deep and sexy but the dBA was nearly as silent as OEM. Right now it is noticeable but still mature, with the main cold start disabled (but not the secondary) with the ecutek tune, cold starts are even LESS obnoxious than stock. Idle is louder than stock, mainly because of 900 rpm idle, but it's not obnoxious. higher idle also makes idle feel smoother.

Overall I'm incredibly happy with the result and the countless hours of research paid well off, and it's mostly thanks to all the experiences of other twin owners who went before me. I'm thinking of buying some gasket sheets and cut my own gaskets since they are incredibly expensive individually, but most likely the remaining smell is due to removal of main cat. Still have stock FP and don't plan on ever removing it. forgot to mention, with the windows down, you can hear all the goodness of the exhaust. with the windows up, it is very livable for chill/city travel. only thing that sucks is driving on the freeway at speeds over 70 mph, 3500 rpms are a bit too loud for long distance. still no regrets.

Could make a video if someone asks, otherwise that's my 2 cents on my final exhaust setup. :cheers:

Someone asks. I could also make a video of mine in a similar fashion, Psr uel header &o`pipe stock front pipe and Q300 cat back, if someone asks. Highway noise is good! windows open/closed is the same as yours but it gets rowdy with heavy throttle