G37 Coupe

Identifying Type of Exhaust

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Old 02-15-2017 | 07:34 PM
  #16  
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Well damn you guy are full of bad news... j/k. I heard it next to a stock g37 before I bought it and the dealer said it had a aftermarket exhaust. I actually liked the sound and was one of the reasons I went with it over the 08. It doesn't seem crazy loud IMO but maybe it's just me.

I will post another video of the sound in the car.
Old 02-15-2017 | 07:36 PM
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Old 02-15-2017 | 07:53 PM
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Originally Posted by Yellafella
Looks like the mufflers were cut out and custom pipes were welded in place. I doubt the cats/resonators are out because the sound is deep rather than higher pitched. But just to make sure, could you post a pic of the undercarriage? The exhaust system also appears to be the stock catback.
I posted one pic of as much of the undercarriage as I could get. Tomorrow when I have light I will try and post more.
Old 02-15-2017 | 07:53 PM
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Ohhh my that is loud.your going to need to upgrade your sound system if ya enjoy listening to music when you drive.i shortened the pipes on my truck but left the mufflers on and it's stupid loud.I can't hear my wife when we're driving....WIN.WIN.
Old 02-15-2017 | 08:17 PM
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I'm having a hard time excepting that it is THAT loud. I am not one for loud cars and I love listening to music. I do crank it up though. The video under the car was right under the pipe as you can see. So it seems louder then the other exhaust videos on this forum.

Do you guys think it sounds annoying loud?

I have watched the exhaust thread and my favorite was the Stillen catbacks and I thought mine sounded more like the Stillen.

I need more opinions!
Old 02-15-2017 | 08:26 PM
  #21  
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Originally Posted by tbssimp
Well damn you guy are full of bad news... j/k. I heard it next to a stock g37 before I bought it and the dealer said it had a aftermarket exhaust. I actually liked the sound and was one of the reasons I went with it over the 08. It doesn't seem crazy loud IMO but maybe it's just me.

I will post another video of the sound in the car.
It's not that much louder than stock. It just has a deeper note and echo than the stock exhaust. I had the same sound on my coupe when I got a muffler delete because I couldnt wait for my exhaust system
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Old 02-15-2017 | 08:27 PM
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Originally Posted by tbssimp
I posted one pic of as much of the undercarriage as I could get. Tomorrow when I have light I will try and post more.
Post a pic of your undercarriage from the side of your car just under the front axle
Old 02-15-2017 | 10:56 PM
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Originally Posted by tbssimp
Great... what am I looking at to fix that? The rear diff I mean. Can you point out what you are looking at?

Is it something urgent or can wait. Sorry for all the questions.
On your rear differential, you see where blackish fluid leaked down onto the diff cover.

The stock differential bushings are filled with fluid instead of solid rubber/poly.

The differential bushings are there to absorb the energy of the differential movement.

It's not "urgent". But you want to get it fixed. Best to go with after market White Line Bushings.

I'm sure many Gs and Zs are driving around with ruptured diff bushings.

https://www.myg37.com/forums/d-i-y-i...-bushings.html
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Old 02-15-2017 | 11:26 PM
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Yep, muffler AND resonator delete. WillCo1 is also correct, bushings are shot but not a big deal, just get it replaced when you get back there for a diff flush or something.
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Old 02-16-2017 | 01:54 PM
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Here are some more pics... It doesn't look like they pulled the cat and resonator to me... Just the muffler? Am I correct with that.
Old 02-16-2017 | 02:16 PM
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Yep, the cats and resonators are still intact. Your car has the stock catback with just a muffler delete. It is not a true straight pipe.
Old 02-16-2017 | 02:22 PM
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Originally Posted by Yellafella
Yep, the cats and resonators are still intact. Your car has the stock catback with just a muffler delete. It is not a true straight pipe.
So when it comes to performance it's the same as stock?

When it comes to sound it's deeper and louder?

And that's about it?

Also as for the rear diff. I am taking it into Infiniti this Saturday. Only because I have an extended warranty on the car and they said they should cover it along with a few other things. I just have to pay $100 deductible.
Old 02-16-2017 | 02:40 PM
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Originally Posted by tbssimp
So when it comes to performance it's the same as stock?

When it comes to sound it's deeper and louder?

And that's about it?

Also as for the rear diff. I am taking it into Infiniti this Saturday. Only because I have an extended warranty on the car and they said they should cover it along with a few other things. I just have to pay $100 deductible.
The performance of your car is slightly better than stock, nothing you can really feel or measure though. It just shed a little bit of weight and a little less restriction in your exhaust. Yes, the sound is deeper and louder, but not loud enough to **** your neighbors off when you start the car. Please note that with a muffler delete, a resonator or cat delete will make your car unbearably loud. If you have plans to install test pipes/hfcs for a little extra ponies, you may want to consider buying sport mufflers or an axleback. My current setup is resonated test pipes and a muffler delete and every downshift can be heard from a mile away. It also rattles my neighbor's windows when I start my car and echos throughout my neighborhood.
Old 02-16-2017 | 03:58 PM
  #29  
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Originally Posted by Yellafella
The performance of your car is slightly better than stock, nothing you can really feel or measure though. It just shed a little bit of weight and a little less restriction in your exhaust. Yes, the sound is deeper and louder, but not loud enough to **** your neighbors off when you start the car. Please note that with a muffler delete, a resonator or cat delete will make your car unbearably loud. If you have plans to install test pipes/hfcs for a little extra ponies, you may want to consider buying sport mufflers or an axleback. My current setup is resonated test pipes and a muffler delete and every downshift can be heard from a mile away. It also rattles my neighbor's windows when I start my car and echos throughout my neighborhood.
Thank you for the info. I think I am going to keep it like it is and if I do ever make a change just go with a Stillen catback.

What are your thoughts on a CAI? I have read some on this forum that said Infiniti did a decent job on the intake and it is a CAI just not located in near the radiator.

This is my DD and will be one for at least 4 years.
Old 02-16-2017 | 09:05 PM
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Originally Posted by tbssimp
Thank you for the info. I think I am going to keep it like it is and if I do ever make a change just go with a Stillen catback.

What are your thoughts on a CAI? I have read some on this forum that said Infiniti did a decent job on the intake and it is a CAI just not located in near the radiator.

This is my DD and will be one for at least 4 years.
Yes, you are correct, our vehicles are pretty much maxed out in terms of power efficiency. However, there are noticeable gains with proper CAIs. Stillen and Injen cais offer around 10-15whp with a proper tune. My Stillen Gen3 intakes came in yesterday and I got it for an amazing deal of $350. I bought them used from a fellow member here by the user JMacsG37. They even came in powder coated.

Check our classified section to find great deals on aftermarket parts, especially the parting out threads. The filters on these are also reusable and you do get slightly better gas mileage.



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