Nameless Performance BRZ Axleback Exhaust - Page 28 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

DGMBRZ · 09-23-2012, 06:52 AM

Good morning guys. Due to my back going out early last week, my dad installed the axleback with high flow cat yesterday. Hearing the car drive to and away from me sounds perfect and amazing. Now driving inside the car, it sounds a lot louder than what it does outside and seems to build up a little pressure inside the cabin. Anyone know why? Love how it sounds outside but not inside the car. I can get used to it but don't want to. Oh and I still have the stock sound tube, if it makes any difference.

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sierra · 09-23-2012, 08:04 AM

Quote:

Originally Posted by DGMBRZ

Good morning guys. Due to my back going out early last week, my dad installed the axleback with high flow cat yesterday. Hearing the car drive to and away from me sounds perfect and amazing. Now driving inside the car, it sounds a lot louder than what it does outside and seems to build up a little pressure inside the cabin. Anyone know why? Love how it sounds outside but not inside the car. I can get used to it but don't want to. Oh and I still have the stock sound tube, if it makes any difference.

I have the same set up sitting in the spare bedroom waiting for the car to arrive in December and I've thought about this same situation as you have found yourself in.
You have 2 choices and both involve fitting another muffler[straight through] in the mid pipe.
The easy and cheap way is to get one fitted into the existing pipe, at least that will prove the worth of the idea. If it works ok then you might want to get that pipe made up in 2.5" with an expansion box and that extra muffler.
I think those 2 rear mufflers are just too small compared with the opposition.

DGMBRZ · 09-23-2012, 08:53 AM

It sounded a little better this morning on my way to work. Starting to like it.

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kwood9000 · 09-23-2012, 10:13 AM

Quote:

Originally Posted by DGMBRZ

Good morning guys. Due to my back going out early last week, my dad installed the axleback with high flow cat yesterday. Hearing the car drive to and away from me sounds perfect and amazing. Now driving inside the car, it sounds a lot louder than what it does outside and seems to build up a little pressure inside the cabin. Anyone know why? Love how it sounds outside but not inside the car. I can get used to it but don't want to. Oh and I still have the stock sound tube, if it makes any difference.

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Try disconnecting and capping the sound tube to see if that helps.

Is the system loud enough where the neighbors will always hear it coming and going?

UncleFester · 09-23-2012, 12:18 PM

There is very little sound deadening in the rear of the car, which could also be the cause.

DGMBRZ · 09-23-2012, 12:33 PM

If the neighbors are outside then yes if, they're inside the house then no LOL. It sounds louder inside than what it does outside.

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kwood9000 · 09-23-2012, 12:43 PM

Quote:

Originally Posted by DGMBRZ

If the neighbors are outside then yes if, they're inside the house then no LOL. It sounds louder inside than what it does outside.

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Good to hear. I have the regular (vs. offset) axleback on order and was concerned about it being too loud, like some Harleys. When I'm inside I can often hear my neighbor's Harley coming down the road, which is a bit too loud for me.

xjohnx · 09-23-2012, 01:01 PM

Quote:

Originally Posted by DGMBRZ

Good morning guys. Due to my back going out early last week, my dad installed the axleback with high flow cat yesterday. Hearing the car drive to and away from me sounds perfect and amazing. Now driving inside the car, it sounds a lot louder than what it does outside and seems to build up a little pressure inside the cabin. Anyone know why? Love how it sounds outside but not inside the car. I can get used to it but don't want to. Oh and I still have the stock sound tube, if it makes any difference.

Sent from my iPhone using Tapatalk

do you have your spare tire removed by any chance? I've found that when the spare is out it can be much louder in the cabin. The spare does a really good job of keeping the in-cabin sound levels in check.

DGMBRZ · 09-23-2012, 01:33 PM

No still have everything in the trunk, including a trunk mat.

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Bamaboy256 · 09-24-2012, 10:14 AM

I would be down for the group buy if a cutoff date is set so that everybody can get their exhaust in a timely manner.

Sportsguy83 · 09-24-2012, 10:15 AM

Quote:

Originally Posted by Bamaboy256

I would be down for the group buy if a cutoff date is set so that everybody can get their exhaust in a timely manner.

Call them today, and let them know about it.

Tainen · 09-24-2012, 11:58 AM

Quote:

Originally Posted by UncleFester

There is very little sound deadening in the rear of the car, which could also be the cause.

I'm thinking this is the main cause of it. I've got the same problem, but with full on headers as well, and I'm hearing the Vivid system is crazy loud as well in the cabin, a well as other systems. Sounds like overall, exhausts are louder in cabin than outside.

It's the car, I think...

DGMBRZ · 09-24-2012, 03:55 PM

Quote:

Originally Posted by Tainen

I'm thinking this is the main cause of it. I've got the same problem, but with full on headers as well, and I'm hearing the Vivid system is crazy loud as well in the cabin, a well as other systems. Sounds like overall, exhausts are louder in cabin than outside.

It's the car, I think...

Yeah starting to get used to it but still not sure. Outside it isn't anywhere near as loud. Love the outside side but hate the noise inside the cabin. Any way to soundproof the trunk? Does the sound tube make a difference?

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gmookher · 09-24-2012, 04:41 PM

Quote:

Originally Posted by DGMBRZ

Yeah starting to get used to it but still not sure. Outside it isn't anywhere near as loud. Love the outside side but hate the noise inside the cabin. Any way to soundproof the trunk? Does the sound tube make a difference?

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This inside the cabin noise is not a sign of a well designed system. Whats the helmholtz do here?

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09-23-2012, 06:52 AM	#379
DGMBRZ Senior Member Join Date: Sep 2012 Drives: 2013 Subaru BRZ in DGM Location: Miami, FL Posts: 230 Thanks: 61 Thanked 63 Times in 54 Posts Mentioned: 21 Post(s) Tagged: 3 Thread(s)	Good morning guys. Due to my back going out early last week, my dad installed the axleback with high flow cat yesterday. Hearing the car drive to and away from me sounds perfect and amazing. Now driving inside the car, it sounds a lot louder than what it does outside and seems to build up a little pressure inside the cabin. Anyone know why? Love how it sounds outside but not inside the car. I can get used to it but don't want to. Oh and I still have the stock sound tube, if it makes any difference. Sent from my iPhone using Tapatalk

09-23-2012, 08:53 AM	#381
DGMBRZ Senior Member Join Date: Sep 2012 Drives: 2013 Subaru BRZ in DGM Location: Miami, FL Posts: 230 Thanks: 61 Thanked 63 Times in 54 Posts Mentioned: 21 Post(s) Tagged: 3 Thread(s)	It sounded a little better this morning on my way to work. Starting to like it. Sent from my iPhone using Tapatalk

09-23-2012, 12:18 PM	#383
UncleFester Senior Member Join Date: Jun 2012 Drives: BRZ Location: Northern Virginia Posts: 597 Thanks: 157 Thanked 178 Times in 120 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	There is very little sound deadening in the rear of the car, which could also be the cause.

09-23-2012, 12:33 PM	#384
DGMBRZ Senior Member Join Date: Sep 2012 Drives: 2013 Subaru BRZ in DGM Location: Miami, FL Posts: 230 Thanks: 61 Thanked 63 Times in 54 Posts Mentioned: 21 Post(s) Tagged: 3 Thread(s)	If the neighbors are outside then yes if, they're inside the house then no LOL. It sounds louder inside than what it does outside. Sent from my iPhone using Tapatalk

09-23-2012, 01:33 PM	#387
DGMBRZ Senior Member Join Date: Sep 2012 Drives: 2013 Subaru BRZ in DGM Location: Miami, FL Posts: 230 Thanks: 61 Thanked 63 Times in 54 Posts Mentioned: 21 Post(s) Tagged: 3 Thread(s)	No still have everything in the trunk, including a trunk mat. Sent from my iPhone using Tapatalk

09-24-2012, 10:14 AM	#388
Bamaboy256 Member Join Date: Aug 2012 Drives: '13 WRB BRZ Location: Georgia Posts: 40 Thanks: 13 Thanked 9 Times in 8 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I would be down for the group buy if a cutoff date is set so that everybody can get their exhaust in a timely manner.

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