The Sedan Exhaust Thread
For those interested...I finally got my mufflers installed on thursday. I'm running 2.5" piping from the resonators back to magnaflow xl 3 chamber mufflers (13216) on my g37x sedan. This helped a lot with the drone in certain gears. For the most part, the mufflers completely eliminated the drone when gradually accelerating out of a stationary position. However, I still hear it at cruising speeds, albeit not intolerable for me, so that is fine.
In terms of the tone/sound, it does not sound that much louder than factory, but to be fair I have not actually heard it from the exterior. I can only comment on from the inside of the car with windows up/down. It has the faintest aggressive growl when accelerating from a stop, but I wouldn't exactly classify the tone as deep. Sadly, that is the best I have heard so far, from sitting inside the car. Not to mention it only sounds good until about 4k, then it just kind of sounds like a blender. When I just had the muffler delete with stock piping, the exhaust sounded much more aggressive at 4-5k. Now, it just sounds loud and strained.. no more growl.There's no exotic undertones whatsoever. Maybe it sounds better from the exterior?
For now, I am going to drive it as is. The unbearable drone is gone and it doesn't sound like a tractor upon cold start anymore. Hopefully the tone will mature? into something more pleasant, but that's probably just wishful thinking. Anyhow, somewhere down the line I plan to swap the resonators out for something shorter, which should give that deeper tone I am looking for. Maybe Vibrant's bottle style or the ultraquiet. As for anyone that's interested in a muffler delete, don't mess with the pipe diameter unless you know what you're doing and plan to swap out the factory resonators. I personally would never recommend anyone to go the route I did. Live and learn.
*EDIT here is a peak of the undercarriage- https://imgur.com/a/SKty6
In terms of the tone/sound, it does not sound that much louder than factory, but to be fair I have not actually heard it from the exterior. I can only comment on from the inside of the car with windows up/down. It has the faintest aggressive growl when accelerating from a stop, but I wouldn't exactly classify the tone as deep. Sadly, that is the best I have heard so far, from sitting inside the car. Not to mention it only sounds good until about 4k, then it just kind of sounds like a blender. When I just had the muffler delete with stock piping, the exhaust sounded much more aggressive at 4-5k. Now, it just sounds loud and strained.. no more growl.There's no exotic undertones whatsoever. Maybe it sounds better from the exterior?
For now, I am going to drive it as is. The unbearable drone is gone and it doesn't sound like a tractor upon cold start anymore. Hopefully the tone will mature? into something more pleasant, but that's probably just wishful thinking. Anyhow, somewhere down the line I plan to swap the resonators out for something shorter, which should give that deeper tone I am looking for. Maybe Vibrant's bottle style or the ultraquiet. As for anyone that's interested in a muffler delete, don't mess with the pipe diameter unless you know what you're doing and plan to swap out the factory resonators. I personally would never recommend anyone to go the route I did. Live and learn.
*EDIT here is a peak of the undercarriage- https://imgur.com/a/SKty6
Last edited by afrayedknot; Mar 17, 2018 at 02:59 PM.
I got a Top Speed Y-back system. It's actually gotten louder the more I drive it but the tone got a bit throat-ier with the increased noise. Went from second guessing my choice (too quiet) to being quite pleased with it. It's a tad louder than OEM when cruising but will let everyone know you're there if you stomp on it.
You'll even notice with your set-up that the tone will deepen after it builds up exhaust deposits on the walls. This is the case with each system I've put on my cars.
You'll even notice with your set-up that the tone will deepen after it builds up exhaust deposits on the walls. This is the case with each system I've put on my cars.
DIY Cheapskate/Mod
Joined: Oct 2015
Posts: 1,875
Likes: 690
From: Richmond Hill, ON
I got a Top Speed Y-back system. It's actually gotten louder the more I drive it but the tone got a bit throat-ier with the increased noise. Went from second guessing my choice (too quiet) to being quite pleased with it. It's a tad louder than OEM when cruising but will let everyone know you're there if you stomp on it.
You'll even notice with your set-up that the tone will deepen after it builds up exhaust deposits on the walls. This is the case with each system I've put on my cars.
You'll even notice with your set-up that the tone will deepen after it builds up exhaust deposits on the walls. This is the case with each system I've put on my cars.
Nope! Tone deepens once that layer of exhaust residue builds up (carbon?) Causes the tone to mellow out and deepen. It was noticeable after about a week for me. Took the wife for a drive after install. Her second ride was that weekend; the first time she had been in it since Monday. I was able to put about 300-325 miles on it during the work week and she had asked if I changed something that Saturday.
Hard to judge exhausts by videos. Some are fresh installs - some aren't. Totally changes the sound sometimes. First video I saw of the TS system left me thinking it was a little too raspy for me but that video also included a aftermarket Y. Subsequent videos had the stock Y pipe and were broken in and it sounded pretty close to what I was looking for so I took a chance on it.
Hard to judge exhausts by videos. Some are fresh installs - some aren't. Totally changes the sound sometimes. First video I saw of the TS system left me thinking it was a little too raspy for me but that video also included a aftermarket Y. Subsequent videos had the stock Y pipe and were broken in and it sounded pretty close to what I was looking for so I took a chance on it.
DIY Cheapskate/Mod
Joined: Oct 2015
Posts: 1,875
Likes: 690
From: Richmond Hill, ON
Nope! Tone deepens once that layer of exhaust residue builds up (carbon?) Causes the tone to mellow out and deepen. It was noticeable after about a week for me. Took the wife for a drive after install. Her second ride was that weekend; the first time she had been in it since Monday. I was able to put about 300-325 miles on it during the work week and she had asked if I changed something that Saturday.
Hard to judge exhausts by videos. Some are fresh installs - some aren't. Totally changes the sound sometimes. First video I saw of the TS system left me thinking it was a little too raspy for me but that video also included a aftermarket Y. Subsequent videos had the stock Y pipe and were broken in and it sounded pretty close to what I was looking for so I took a chance on it.
Hard to judge exhausts by videos. Some are fresh installs - some aren't. Totally changes the sound sometimes. First video I saw of the TS system left me thinking it was a little too raspy for me but that video also included a aftermarket Y. Subsequent videos had the stock Y pipe and were broken in and it sounded pretty close to what I was looking for so I took a chance on it.
For the money, this is a great system IMO. Uses the OEM y pipe but replaces all the restrictive parts of the exhaust. Would I have liked a Motordyne or FI cat-back? Sure. But the TS is a nice set-up for the $ without taking the risk that comes with a custom set-up. When done right, the custom set-ups sound unique and great at a superb price.
Registered Member
Joined: Aug 2017
Posts: 227
Likes: 25
From: Ozark, MO
I feel your pain with going the custom route, but I think you're on the right track now. I would not recommend the Vibrant ultra-quiet resonators if you're already concerned with it being too quiet. The bottle style resonators will only remove rasp and clean the tone up a bit - won't affect volume much at all.
I think if you really want that exotic undertone, 2.5" piping from cats on back, an x pipe, Vibrant bottle style resonators, and the Magnaflow xl 3 chamber mufflers will achieve this.
I've had that setup with 2.25" piping for around 1,500 miles now and it sounds orgasmic. It seems like the more I drive it the deeper and more exotic sounding it becomes (I never listen to music anymore). The drone has also reduced greatly but the exhaust actually seems louder. Point is, give it some time before making any changes, and if you're not satisfied then, I recommend the setup mentioned above.
I think if you really want that exotic undertone, 2.5" piping from cats on back, an x pipe, Vibrant bottle style resonators, and the Magnaflow xl 3 chamber mufflers will achieve this.
I've had that setup with 2.25" piping for around 1,500 miles now and it sounds orgasmic. It seems like the more I drive it the deeper and more exotic sounding it becomes (I never listen to music anymore). The drone has also reduced greatly but the exhaust actually seems louder. Point is, give it some time before making any changes, and if you're not satisfied then, I recommend the setup mentioned above.
Thanks for the recommendations obsidian. I've driven about 350 miles in the week I've had the new setup and the tone has gradually become deeper. They are mostly highway miles so hopefully the sound will continue to improve. Right now, it sounds great with a deep purr, but just in the lower RPMs. I will most likely keep this setup for the time being. It's not quite loud enough, but at least it's not obnoxious.
I've spent about $570 so far and If I decide to install x-pipe and resonators, I would expect an additional $5-600, which would put me over 1k. It's hard for me to justify that price tag, when I had no intentions of even spending $500. I would have preferred a set of wheels than an exhaust if I knew I would end up spending a grand. Nonetheless, it has been a useful learning experience.
I've spent about $570 so far and If I decide to install x-pipe and resonators, I would expect an additional $5-600, which would put me over 1k. It's hard for me to justify that price tag, when I had no intentions of even spending $500. I would have preferred a set of wheels than an exhaust if I knew I would end up spending a grand. Nonetheless, it has been a useful learning experience.
You could be an absolute psycho and get a 3in/out muffler like this:
https://www.magnaflow.com/products?partNumber=14298
where the Y-pipe joins the mid pipes.
https://www.magnaflow.com/products?partNumber=14298
where the Y-pipe joins the mid pipes.
I got a Top Speed Y-back system. It's actually gotten louder the more I drive it but the tone got a bit throat-ier with the increased noise. Went from second guessing my choice (too quiet) to being quite pleased with it. It's a tad louder than OEM when cruising but will let everyone know you're there if you stomp on it.
You'll even notice with your set-up that the tone will deepen after it builds up exhaust deposits on the walls. This is the case with each system I've put on my cars.
You'll even notice with your set-up that the tone will deepen after it builds up exhaust deposits on the walls. This is the case with each system I've put on my cars.
DIY Cheapskate/Mod
Joined: Oct 2015
Posts: 1,875
Likes: 690
From: Richmond Hill, ON
Is this the Y-back system you have? Infiniti G35 G37 Sedan 07-14 Top Speed Pro-1 Y-pipe Back Exhaust System Bevel Edge Tips
... Went up in price so much... Just like everything else. Bought it for $540...I love it because it's. Quiet enough that the cops don't bother you, but still louder than stock. And when you step on it, it screams gloriously. For a daily driver this is a fantastic option.
Last edited by hexotic; Mar 23, 2018 at 04:46 PM.
Thats the one ... Went up in price so much... Just like everything else. Bought it for $540...
I love it because it's. Quiet enough that the cops don't bother you, but still louder than stock. And when you step on it, it screams gloriously. For a daily driver this is a fantastic option.
... Went up in price so much... Just like everything else. Bought it for $540...I love it because it's. Quiet enough that the cops don't bother you, but still louder than stock. And when you step on it, it screams gloriously. For a daily driver this is a fantastic option.
Registered Member
Joined: Jul 2014
Posts: 1,301
Likes: 113
From: Tempe,AZ
Originally Posted by RMB5190
I managed to grab mine for $500 somehow. Couldn't agree more though with your assessment. Really comes to life above 3k RPMS but you can go completely stealth if you're driving normally.
