Headers too loud
 

Hey guys
I have greddy cartback and just recently put psr UEL headers and now ita way too loud to point that it gives me a headache. Anyone knows what i can do apart from removing headers or catback?
Thank you


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Which catback?

Still stock front pipe? If so then changing the catback to something quieter is probably the only option. Maybe JDL ultra quiet or HKS duel res front pipe may help but dont know how hard it is to get those in down there

greddy Supreme elite
Its not a loud catback to be honest
Fron pipe is stock but overpipe is psr


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Overpipe shouldnt make a huge sound difference but can a bit. Stock front pipe doesnt leave many options since nothing is quieter really.

Sometime even quiet catbacks lead to wierd resonance. When I had the q300 in my set-up and it was super loud and raspy like a 90s honda. Even stock catback was bad in that regard.

The main problem is on lower rpms it doesnt sound nice. I wouldnt care if it was juts really loud but this is actually annoying. On 2000rmp when i accelerate it sounds something is flapping in the exhaust


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Sure its not a leak? Did you use new gaskets? Otherwise it just sounds like rasp that comes with a catless UEL. Its worst when down in the 1500-2k range.

Also trying to accel that low usually isnt a great idea due to the super high load.

There is one other solution to quieting down your current setup; however, it will require messing with the midpipe section of your catback. You can go to a muffler shop and ask them to weld on another resonator before or after the resonator that's already on there. The resonator will have to be compact, and depending on the resonator, it will drastically reduce the noise.

That is what I did when my setup at the time was way too loud for my taste. I was skeptical at first when he said that with the addition of a small resonator, it would reduce the volume by 25%, but after the welding was done and I started the car, I was utterly shocked to find that it was even quieter than that!

It not only took the nasty bite out of the exhaust note, but reduced the volume to about half! The welder even said that he could have even made it quieter with a different resonator if I wanted.

I hope that this helps with your situation!

I like DemonRawr's solution. I just went back to the stock catback for the same reason - full setup was just too loud for DD. I am now running FT86SF catted uel, motiv overpipe, invidia resonated front pipe, stock catback. Not ideal in the looks department, but is so livable and still has some tone (but no rasp). Butt dyno for the current setup feels better than my previous attempt to quiet down, which was catted uel, motiv overpipe, stock front pipe and FT86SF v1 resonated catback.

This sounds perfect. I'll give it a go and hope i get the same result. How much roughly is the cost of this?


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I had the same problem with EL header and Perrin exhaust. I went to the Invida Q300 exhaust and HKS dual resonated front pipe.

Try the HKS font pipe 1st, if that docent work good enough exhaust to the Q300.

Mostly depends on the cost of the additional resonator. The welding job itself usually costs about $100. So, I'd say somewhere in the range of $200-350 total.

These cars get really loud with a catback and header if you're not careful, which is seems like that's what happened!

I would look into having an exhaust shop weld in something like a vibrant ultra quiet resonator into the FP to replace the stock resonator. The stock FP resonator is decent, not great. Swapping it with something great, that's designed to take the volume down a bunch should put a nice dent in it.

The Greddy catback has a resonator in it already, but it's a very small one, so if you need more, you could look into having that one replaced with a more impressive resonator as well.

Good luck!

Add a supercharger. That lowered my volume....by adding volume of air intake? Lol. But yeah, it worked.


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So i went to a few shops to get a resonator added. I was told that its not possible to make it any more quiet than it is. And they didnt really give me another option


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Thought it sounded too easy a fix but worth a try and $350 sounds like expensive for cutting out one resonator and replacing it with another. Perhaps I'm wrong and it's reasonable.

I have the same issue with the Tomei UEL, SME op, Nameless HF catted FP with helmholtz, and Namelees AB with 4" resonators.

Sounded great when OEM headers but WAY too loud with the Tomei. Had to resort to refitting OEM AB.

Not 100% happy with the tone/note, sounds kind of metallic thanks to the helmholtz, but a least I don't fear being put off the road every time I pass a police car. Still has some rumble but volume is much reduced.

With a tune performance seems every bit as good as the Nameless.
Put your OEM back on if you can till you can find a fix and at least you won't have a continual headache.

What's the actual OD of the OEM midpipe 2.25" or 2.5".

Its been a few days now and it sounds much better. Its still loud but it doesnt have that annoying tone to it so my only problem atm is the cold start


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Please re-read my suggestions. My new system is as quiet or quieter than stock was. And works well with my supercharger and e-85. What I did is all bolt on you can do your self.

"Its been a few days now and it sounds much better. Its still loud but it doesnt have that annoying tone to it so my only problem atm is the cold start."

OpenFlash Tune will drop the cold start revs and make it a lot quieter.

The car was dyno tuned recently so its already been done but still loud as


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Yes virtually impossible to find the perfect note once headers are on the car. Catless anyway. Catted headers might be a different story.

The Vibrant Ultra Quiet method sounds like a solution but can't seem to find Vibrant being available in Oz. Can buy of Amazon and have here for about $200 oz.

Just have to climb under car to measure and see where I can get one welded in.

If you're describing a metallic buzz around 2k -3k you may want to check if the expansion joints on the header are contacting the alloy skid plate. I had this with my PSR headers. If its happening, you can see the marks looking down through the engine (ie no need to remove skid plate)
Easily fixed with a hammer and punch.
I posted about it somewhere here if you need photos.

Just a quick update guys
The sound is a lot quieter now
I think i just had to give it a few days for it to settle
Cold start is still loud but well nothing i can really do


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If you could link me the photos i would really appreciate it



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I too was in the same predicament as @Armin93 a while back with the UEL header & Perrin CB, best solution was the stock CB. Still I wanted a little more noise but less than before so I managed to find an STI AB which opened up the noise hwy again but not as loud as Perrin. I had an additional resonator in the midpipe added which helped a little by taking some of the bark away and I guess it become livable to me as a DD although it's not one atm. What I'm trying to say is there's very little room under our cars for big midpipes & the best way to shut her up is probably the rear mufler as the stocky does it really well.

Another thing to note is you need to give exhausts a few thousand kms to carbon up & re-evaluate noise levels then.

I think ppl are way too quick to judge their new exhaust systems.
The stock exhaust on my new brz sounded terrible until i had done abt 700km and a long country drive. Now it sounds completely different and so much better.
Was raspy and tinnie but now has a much deeper roar.

Yes you can.

I have PSR UEL's and Tanabe cat back, it's rather loud on song.

But with a tune, you can fix the cold start, Mine is pretty quiet while its warming up. ;)

( https://youtu.be/NWG-drccQWw this is my exhaust for comparison, just make sure you listen on a something thats got some proper speakers, not a phone or laptop!)

Mine sounds about the same
And i did get a dyno tune after i put the headers on and tuner said he tried to make the cold start quiet but still loud as



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So is mine after a tune. Pre tune used to shake the garage and at 6am made for one very shitty wife and angry neighbours.
After tune warmup lasts about 1 min and is a lot of decibels quieter.

I don't about yours...my is pretty quiet...
I have greddy Supreme elite, borla UEL uncatted header,,Invidia uncatted resonated front pipe,, its quiet beside the loud rumble.