Questions about Nameless Front pipe with Helmholtz Resonator

[Xdragonxb0i]

for those of you who do have it, do you guys think its worth it? I want the performance gains but near stock level sounds. So i will get a high flow cat, is the resonator needed?

[Sportsguy83]

Yes, Worth it. I've heard both setups, and own with helmholtz. Get it especially sicne you are looking to keep it as similar to stock sound as possible. (That was my same goal)

[FR-S Matt]

I'm still in question about the Helmholtz as well. I ordered the centered version of the Axleback but I'm not sure if it is coming that way or offset. I do plan on getting a header so that alone might be worth getting the helmholtz for.

Actually, scratch that. If I go the UEL route, I probably won't get one because racecar.

[mad_sb]

I just installed mine with Helmholtz... I also got it with because i plan to do the header as well. I also just ordered the new 3" inlet dual 5"X8" axle back. Honestly, with the stock axleback the only time it is even noticeably louder than stock is on cold start. After the idle kicks down you can't even tell it's there.

[BRZ?]

How does the catless front pipe with the helmholtz sound? Significantly louder than catted helmholtz?

[FR-S Matt]

Originally Posted by BRZ?

How does the catless front pipe with the helmholtz sound? Significantly louder than catted helmholtz?

I would say yes but with rasp as 90% of exhaust systems that go catless are raspy. Even with the stock header cat still there, you can get rasp with it. It's not worth going cheaper for the horrible sound.

[Cade01]

Originally Posted by FR-S Matt

I would say yes but with rasp as 90% of exhaust systems that go catless are raspy. Even with the stock header cat still there, you can get rasp with it. It's not worth going cheaper for the horrible sound.

It's not raspy at all, I have the catless over/front pipe with the HH resonator and the offset axle back and it is actually way quieter than I had hoped it would be. I plan on getting their header(most likely catted) as well so I got the HH res. Definitely louder when cold, but mellows out real quick as it warms up, and it's almost inaudible at cruising speeds, absolutely no drone in my car. And not raspy.

I was under the impression, correct me if I'm wrong, that the resonator was only targeted at the frequencies produced by the header and should have no effect on the sound of the rest of the exhaust.

[Huehuecoyotl]

Originally Posted by Sportsguy83

Yes, Worth it. I've heard both setups, and own with helmholtz. Get it especially sicne you are looking to keep it as similar to stock sound as possible. (That was my same goal)

can you compare the sound, tonal qualities loudness, high pitch content and rumble content of this with vs without vs say perrin resonated vs unresonated?

(yup, I'm considering a nameless for our 2nd BRZ)
you know, I want dirty nitty gritty details sportguy!

[FR-S Matt]

Originally Posted by Cade01

It's not raspy at all, I have the catless over/front pipe with the HH resonator and the offset axle back and it is actually way quieter than I had hoped it would be. I plan on getting their header(most likely catted) as well so I got the HH res. Definitely louder when cold, but mellows out real quick as it warms up, and it's almost inaudible at cruising speeds, absolutely no drone in my car. And not raspy.

I was under the impression, correct me if I'm wrong, that the resonator was only targeted at the frequencies produced by the header and should have no effect on the sound of the rest of the exhaust.

Your setup has enough muffle to reduce the rasp with the resonator and off-set design. You'll have to be careful if you go with a catless header though. Jason said it gets really loud with theirs and even in the catted downpipe video, there was some rasp in the 2.5" setup. Not sure if it was the redesigned 2.5" system though.

[Sportsguy83]

Originally Posted by Huehuecoyotl

can you compare the sound, tonal qualities loudness, high pitch content and rumble content of this with vs without vs say perrin resonated vs unresonated?

(yup, I'm considering a nameless for our 2nd BRZ)
you know, I want dirty nitty gritty details sportguy!

I don't have empirical data on exactly how loud it is.


A) MY BRZ with Helmholtz and Ofsset mufflers has a deeper tone, and is quieter than


B) @DGMBRZ's W/O Helmholtz and Non-Offset mufflers has a higher pitch tone, and sounds more aggressive.


Both tones are similar, but B) commands more attention, sounds more like a race car. A) is more mellow.

[Huehuecoyotl]

Is "A" wife/business client friendly as a passenger, can it be compared to stock, and can it be said "its quiet" below 4000 rpms? I need to get inside a Nameless equipped car,and under one to see this thing with the helmholtz

me likey! Thanks for your feedback!

[Cade01]

Originally Posted by Huehuecoyotl

Is "A" wife/business client friendly as a passenger, can it be compared to stock, and can it be said "its quiet" below 4000 rpms? I need to get inside a Nameless equipped car,and under one to see this thing with the helmholtz

me likey! Thanks for your feedback!

My exhaust setup would be wife/business client friendly according to my wife, and that is 2.5" offset (original version) and a catless over/front pipe with HH resonator. Below 4000rpms cruising you can barely even hear it.

[Sportsguy83]

Originally Posted by Huehuecoyotl

Is "A" wife/business client friendly as a passenger, can it be compared to stock, and can it be said "its quiet" below 4000 rpms? I need to get inside a Nameless equipped car,and under one to see this thing with the helmholtz

me likey! Thanks for your feedback!

I'd say its acceptable. Not quiet like stock, but quiet enough to be pleasant. I will show you a pic of the Helmholtz give a moment.

Edit: That growing tumor/appendix is the Helmholtz.

[Cade01]

I forgot to mention, I believe the new revision exhaust also uses 8" mufflers instead of 6" like mine has, so that will also help with sound level.