affect of resonators in exhaust.
 

I'm debating on a medium to loud exhaust, the nameless 5inch muffler axleback.

From what i've read and heard in video's it's about what i want before adding headers.

The question is, since this leaves the mid pipe stock and smaller could i have a local shop fab up a 2.5 inch add a decent resonator and bring the level back down?

Will a resonator reduce volume or is it more specific frequencies?

For reference I'd like it less than an N1 on an sti. More like the q300 on those cars. (I haven't heard exhaust on these cars in person because only a handful have them in my area)

Frequencies.

Q300, too quiet. I currently have my N1 on now and love that deep bassy rumble. Q300 I have on the side if I ever get tired of the N1.

It's the axleback that needs more muffling. It's almost like any dual canister design, but those mufflers are tiny in comparison to most.

My recommendation:

Header(catted or catless, need to make a choice on this)
Overpipe (Pick your flavor or the Nameless Catted DP/OP w/ Helmholtz)
Front pipe (catted or resonated(non Helmholtz) with a catless header)
Front pipe (Any type with a catted header, preferably catted or resonated to control volume)
Stock midpipe is fine, you could even have a shop add an additional resonator or use a giant one like Perrin's in a custom 2.5" midpipe
The Nameless Axleback is the loud portion. The only changing that is swapping catbacks.

It's difficult because you have to gauge the sound based on when the header goes on, and work from there.

Yeah currently i have the 2.5 catted w/ Helmholtz resonator dp.

I'm thinking nameless or JDL el catless headers.

I want to drop weight since adding power is hard without FI. All of the light cbe are crazy loud.



Maybe sp elite greddy....3lbs lighter lol

your setup is going to sound pretty loud specially with the JDL header. adding a resonator wont change much specially with the nameless axleback. you will get lots of drone at highway speeds.

a Q300 is really quiet. thats what i have and i love it! not too loud but you can hear it. no rasp no drone just a nice quiet tone all around. to me a q300 or a greddy spelite are perfect for this cars but then i am an old fart that listens to NPR in the morning. 10 years ago i had an Evo2 on my EP3 and i loved it now the EVO/N1/nameless are way too loud for me. im getting old.

Would really love to hear the Q300. I almost bought that but went with the ARK GRiP. I love the GRiP, but it just hangs really low. It was definitely very quiet up until I put my jdl header on, its still quiet but when I get into it, it gets very throaty. I can hold a conversation very easy without it being a hassle, its not like I have to try to keep the car at a certain speed or anything to talk...but seems the q300 is even quieter, which I would like lol.

The Nameless axleback is only loud in the muffler delete or 4" muffler configs. The 5" muffler configuration is probably better able to handle noise than oem when you add a header. Just make sure you keep stock mid pipe & go with a Nameless FP/OP with HFC & hemholtz resonator, & your exhaust should sound just fine & not be too loud.

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Sorry but I found that this was not the case at all. I had the 5" offset mufflers in the new configuration with the 2.5" inlet. I also ran this with the fp/op with hfc and resonator. It sounded fine until I added my JDL header. Then it was pretty loud. It didn't drone but when I got on the throttle, it sounded racecar loud. It was over the top for me though some people probably would like the split personalities that setup had. I found that it was so loud I never wanted to get on the throttle anymore which made the car a drag to drive day to day.

[ame="http://www.youtube.com/watch?v=GHRMmWSMEyo"]2013 BRZ with UEL Headers - YouTube[/ame]

Did you have the sound tube deleted?

Yeah, I even put the windows down, and tried to hear it when I stepped on it. Not overbearing at all. Even the UEL rumble is hard to detect unless you're behind the car. Total silence inside with the windows up driving civil, can definitely hear it when you get on it though.

Sound tube? Like you could hear any intake noise with the exhaust that loud. :lol:

I think it was still installed at that time though. That video was with the windows up, rear seat up and all kinds of sound deadening in the rear of the car.

That probably added to the noise, thus why it was so much louder when you got onto the throttle.

I hope you're not being serious. The noise is 99% exhaust.

Would it obstruct flow if i had a custom midpipe with a small muffler and resonator.?

Thinking if it ends up being too loud i could always add a small muffler prior if it doesn't rob power or f up the tone

The tone was really nice but if that video is anywhere near real world it's on the loud side.


Hard to compare it since i haven't heard this car with any kind of exhaust.

It sounds like it doesn't drone while cruising. If that is the case, i love it!

Because racecar. Seriously that was fantastic soundimg

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Does a bigger muffler affect flow? I'm having issues of it being too loud.. I'm FI, EL headers, straight front pipe, Invidia N1. do you need a tune for just changing the CBE? What other options are there other than the q300 for a quiet exhaust? I saw a video with a catless setup with the q300 and it was a bit raspy. any bassy toned CBE that is quiet?

No, not really. It's just a weight addition & sound reduction. Thus why straight pipe, unresonated, muffler-less is what racecars have... B/c weight reduction.

For Street cars, mufflers & resonators don't take away performance & help with noise

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CBE shouldn't need a tune....maybe the perrin or Greddy DP elite but i haven't heard them in person.

Only cbe that will mess with your tune is maybe a straight dump or stock. (Had no effect on a wrx or sti)

This may sound very simplistic but if you look and listen to all of the available options you'll see that there is a very definite correlation between muffler size and overall loudness. Every CBE/ABE using small dual canister mufflers is on the loud side of the spectrum while those with the largest single mufflers are the quietest.


IMO Nameless, Invidia N1, et al sound amazing right up until you add a cat-less header and then become obnoxiously loud, raspy and droney. The SP Elite and Q300 are almost too quiet until you add a header and then become just about perfect, IMO.

Apologies if off topic, but I saw Q300 mentioned a few times so I'd ask in here: how does it compare to the SP Elite in terms of volume (on stock vehicle)? Would you say one is noticeably louder than the other or the same?

I'm just going to warn you if you are planning on going Catless UEL's, Front Pipe, and Nameless Axelback, you might want to reconsider. That's my current setup and the amount of rasp is ridiculous. It sounds horrible. I created a thread about it asking for advice a few weeks ago. I'm going to be installing the Perrin exhaust over the weekend.

You need to decide now, before you buy your Axelback/CBE if you are going to want catless headers, or else you are going to be disappointed in the end.

In my experience this is spot on (I've run both an N1 and Q300). Biggest decision you need to make is if you are or are not going to run a header. After that, pick your catback, cats, resonators, based on your first decision of header/no header.

I agree with this guy 110%. I had the Perrin non resonated headerback system before I got the Borla uel headers. It sounded great until I got the headers and to say the least I was embarrassed to drive me car. Don't make the same mistake I did. If your going to get headers down the road get a resonated system. If not, get a non resonated system. End of story.

So far I'm only seeing the SP elite, and Q300. any other choices out there for decreased noise and at least 2.5"?

Perrin 2.5 resonated CBE

@BRZPDX have you checked out our DT-S or GRiP systems?

DT-S:
http://frs-tuner.skipthediet.com/wp-..._Exhaust_2.jpg
http://i613.photobucket.com/albums/t...ps0351e12e.jpg

GRiP:
http://i613.photobucket.com/albums/t...psabd6fbfb.jpg

They sound refined outside and drone is minimized inside with the highest amount of usable mid-range power!

Erick @ ARK Performance.