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Old 05-17-2018, 10:32 PM   #1
joyride305
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Member#: 484935
Join Date: Apr 2018
Default New Member - Bought exhaust, have questions

Hey Everyone,

I'm pretty new to the Subaru community, having been part of the Mini crowd for about 8 years. I'm pretty familiar with forums and typically search more than I post, but I had a pretty specific question I wanted to put out there. Just bought a 16' WRX (White/Limited) and after a lot of reading research I decided to try out the Invidia R400 + AP. Just about a week old now and I like the sound, but I don't LOVE it like I used to with my Mini.

Mini - Straight pipes with resonator and stock cats/headers. Awesome sound, not obnoxiously loud, but louder than I want to be at the moment with the WRX. Like many I want it the tone to be subtle most of the time and throaty/growly when I'm on it. A buddy did a drive by so I could hear it, and from the outside it sounds damn near exactly like what I had hoped. But from the cabin it's more like a hum than a growl and a bit underwhelming. Good news is theres basically no drone when cruising, and just a tad during certain RPM's under normal acceleration like advertised. Here comes the actual question....

WRX - Stage 1 LWG AP, R400, everything else stock. Is there anything I can do to hear a little less "hum" and a little more growl under normal (and aggressive) driving without increasing overall volume by a significant amount? For example a J pipe with a freer flowing cat? Or do I just have to be comfortable with having some of the things I want in an exhaust and realize there will never be a perfect middle?

Any advice appreciated or constructive criticism welcomed and appreciated.
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Old 05-18-2018, 08:26 AM   #2
Samurai Jack
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Cheapest, easiest thing to do is roll down all your windows.

Anything else you do to make it louder, like freer flowing cat or no cat or larger exhaust piping or headers, etc. will definitely create more noise everywhere.

You may get the opposite of what you are looking for - noisy and droney. Exhausts are funny things and it is difficult to get exactly what you want. The only two guarantees are stock exhaust ( quiet ) and open exhaust ( extremely loud ) and waiting to be stopped and cited by the police.

You could also rip out all your sound insulation.

You also have to remember that you are talking about two completely different cars with two completely different engines. You could spend an extreme amount of money changing exhaust pieces and still never get what you exactly want.
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Old 05-18-2018, 09:03 AM   #3
Obviously Tyler
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Location: Bucks County, PA
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2016 WRX
2018 Crosstrek

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Roll down your windows, open the sunroof and fold down your back seats. You'll hear it.

I had the same personal issue with my Mishimoto catback. I loved the quality and outside sound, but it was literally a hum on the inside.

I resolved that by going with an ETS extreme catback. No mufflers or resonator. Sounds on the inside what the Mishimoto sounded like on the outside.

My j-pipe is stock and it'll likely stay that way for awhile.
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Old 05-18-2018, 11:00 AM   #4
Valantia
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WR Blue Pearl

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Quote:
Originally Posted by joyride305 View Post
Hey Everyone,

WRX - Stage 1 LWG AP, R400, everything else stock. Is there anything I can do to hear a little less "hum" and a little more growl under normal (and aggressive) driving without increasing overall volume by a significant amount? For example a J pipe with a freer flowing cat? Or do I just have to be comfortable with having some of the things I want in an exhaust and realize there will never be a perfect middle?
I have the exact same exhaust as you on my car and I understand exactly where you are coming from. The R400 has a nice exterior sound but on the inside it just had this drone/hum that wasn't what you were looking for once you accelerated past idle.

I ended up picking up a mishimoto catted, non-resonated downpipe and midpipe and I absolutely love the sound now. It has the nice growl and rumble you are looking for. When doing pulls it sounds so mean, and at highway cruising speeds it honestly isn't all that much different than just having the stock downpipe midpipe, and the R400 catback.
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Old 05-19-2018, 08:43 PM   #5
GlarryHoodDIT
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Quote:
Originally Posted by Valantia View Post
I have the exact same exhaust as you on my car and I understand exactly where you are coming from. The R400 has a nice exterior sound but on the inside it just had this drone/hum that wasn't what you were looking for once you accelerated past idle.

I ended up picking up a mishimoto catted, non-resonated downpipe and midpipe and I absolutely love the sound now. It has the nice growl and rumble you are looking for. When doing pulls it sounds so mean, and at highway cruising speeds it honestly isn't all that much different than just having the stock downpipe midpipe, and the R400 catback.
The Midpipe is part of the Catback, are you sure you don't mean Intermediate Pipe?


This is the chain

Headers > J Pipe > Intermediate Pipe (Usually combined with J Pipe and sold as one piece) > Midpipe > Axelback (Axelback and Midpipe combined make a "Catback")
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Old 05-20-2018, 07:32 AM   #6
LedDriver
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Dark Gray

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I don't have first hand knowledge of these but according to the internet engineers the Helmholtz resonators will help alleviate drone.


https://www.google.com/search?q=helm...EIKzAB#imgrc=_
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Old 05-20-2018, 09:09 AM   #7
joyride305
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Quote:
Originally Posted by Valantia View Post
I have the exact same exhaust as you on my car and I understand exactly where you are coming from. The R400 has a nice exterior sound but on the inside it just had this drone/hum that wasn't what you were looking for once you accelerated past idle.

I ended up picking up a mishimoto catted, non-resonated downpipe and midpipe and I absolutely love the sound now. It has the nice growl and rumble you are looking for. When doing pulls it sounds so mean, and at highway cruising speeds it honestly isn't all that much different than just having the stock downpipe midpipe, and the R400 catback.
It's nice to hear from someone who has the same exhaust. From the outside it's honestly damn near perfect. Subtle enough to turn a head, not loud enough to be annoying.

Like Glarry said, I am curious if you changed the whole "j pipe" or just the intermediate pipe. It seems like the intermediate pipe is where the restriction is so I'm not sure that it would even make a difference but then again I am new to these cars!
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Old 05-20-2018, 09:10 AM   #8
joyride305
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Join Date: Apr 2018
Default

Quote:
Originally Posted by LedDriver View Post
I don't have first hand knowledge of these but according to the internet engineers the Helmholtz resonators will help alleviate drone.


https://www.google.com/search?q=helm...EIKzAB#imgrc=_
I was very close to buying an Ark but they are so damn expensive. Maybe I'll still go that route one day if I hear it in person and fall in love.
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Old 05-20-2018, 09:22 AM   #9
joyride305
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Member#: 484935
Join Date: Apr 2018
Default

Quote:
Originally Posted by Samurai Jack View Post
Cheapest, easiest thing to do is roll down all your windows.

Anything else you do to make it louder, like freer flowing cat or no cat or larger exhaust piping or headers, etc. will definitely create more noise everywhere.

You may get the opposite of what you are looking for - noisy and droney. Exhausts are funny things and it is difficult to get exactly what you want. The only two guarantees are stock exhaust ( quiet ) and open exhaust ( extremely loud ) and waiting to be stopped and cited by the police.

You could also rip out all your sound insulation.

You also have to remember that you are talking about two completely different cars with two completely different engines. You could spend an extreme amount of money changing exhaust pieces and still never get what you exactly want.
Yeah it's very tricky in my experience as well. But something about this exhaust....it doesn't change at all even with the windows down!! I was very surprised not to even hear it resonate when next to another vehicle or wall especially with the windows down, but the same hum exists either way. Windows down just adds wind noise
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