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Need help finding a quiet crossflow muffler

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Old Jan 25, 2011 | 09:23 PM
  #1  
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Need help finding a quiet crossflow muffler

Wow, it has been a long time since I posted anything in this forum!

Maybe you guys can help me with my muffler issue. I am looking to replace my Edelbrock muffler that came with the cat-back. My intent is to quiet the car down so it doesn't drive me crazy at cruise and maybe close to factory. I am actually tired of the loud exhaust but want to retain the "cammy" sound.
I have searched here and just about everywhere, but not much luck. I need to just replace the muffler, no pipes. The muffler must be a crossflow, 3" inlet/dual 2.5" outlet, and must be quiet. Do not mind some power loss, this is not a race car.
No Flowmaster, or Magnaflow. Had those on there before and do not like the sound, plus they would not quiet the car like I want.
My question is, if any of you from personal experience know of a muffler that would meet my criteria.

BTW, I have listened to videos, looked through different suggestions from other posts, and still not much out there.

Thanks for the help!

Ozzy
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Old Jan 25, 2011 | 10:10 PM
  #2  
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Re: Need help finding a quiet crossflow muffler

stock muffler lol
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Old Jan 25, 2011 | 10:16 PM
  #3  
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Re: Need help finding a quiet crossflow muffler

Originally Posted by MassD
stock muffler lol
I just knew someone was going to say that
Stock is not good anyways, it's 2.5" all around.
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Old Jan 25, 2011 | 11:21 PM
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Re: Need help finding a quiet crossflow muffler

Haha i had to say it. What if you put a stock muffler and electric cutout's, make it a sleeper
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Old Jan 26, 2011 | 07:15 AM
  #5  
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Re: Need help finding a quiet crossflow muffler

Are 4th gen mufflers 3" in?
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Old Jan 26, 2011 | 08:57 PM
  #6  
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Re: Need help finding a quiet crossflow muffler

thats a good question about the 4th gen muffler. they might offer a bigger inlet on a stock style muffler. check with your local exhaust shop. you can always try to double up mufflers too. my dynomax ultra flo is quiter than the 80 series flowmaster. I think the dynomax super turbo is quiter than thier ultraflo's
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Old Jan 26, 2011 | 09:01 PM
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Re: Need help finding a quiet crossflow muffler

my flowmaster is quiet, i hate it.
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Old Jan 26, 2011 | 10:17 PM
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Re: Need help finding a quiet crossflow muffler

Cherry bomb makes some sort of sound muffler. They used it on horsepower and kept the decibels low and still gained power
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Old Jan 27, 2011 | 06:41 AM
  #9  
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Re: Need help finding a quiet crossflow muffler

correct me if im wrong but i beleave that 89-92 gta trans am had the 3 inch exhaust ? and you could use a stock muffler from one of them
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Old Jan 27, 2011 | 01:53 PM
  #10  
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Re: Need help finding a quiet crossflow muffler

Originally Posted by bad_to_the_bone
correct me if im wrong but i beleave that 89-92 gta trans am had the 3 inch exhaust ? and you could use a stock muffler from one of them
I searched for different years and did see some with 3" inlet but the outlets are 3" also. Some with 2.5" outlets have 2.5" inlets, so my pipe size combo is hard to find on a quiet muffler.
Don't get me wrong, I have seen several, including the Dynomax Super Turbo in a Mustang, outlet is 3" and I am not sure how it would sound on my car:
http://www.summitracing.com/parts/WLK-17670/
Another I found was the Dynomax Ultra Flo 17227 (3"/2.5") but I am not sure how loud it would be:
http://www.summitracing.com/parts/WLK-17227/

I guess I can go ahead with the 3" outlets and just buy the individual pipes. I really don't want to buy a whole new catback, the money is a bit tight right now and we are facing the possibility of moving to another state.
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Old Jan 28, 2011 | 10:46 AM
  #11  
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Re: Need help finding a quiet crossflow muffler

i have a flowtech afterburner.. its like 8 years old tho so im not sure they are still around its 3 in inlet dual 2.5 out welded case.

its far louder and meaner than stock, but not obnoxious
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Old Jan 29, 2011 | 09:56 PM
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Re: Need help finding a quiet crossflow muffler

dynomax super turbo crossflow transverse muffler.
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Old Jan 30, 2011 | 03:27 AM
  #13  
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Re: Need help finding a quiet crossflow muffler

Originally Posted by Ozzy88GTA
I searched for different years and did see some with 3" inlet but the outlets are 3" also. Some with 2.5" outlets have 2.5" inlets, so my pipe size combo is hard to find on a quiet muffler.
Don't get me wrong, I have seen several, including the Dynomax Super Turbo in a Mustang, outlet is 3" and I am not sure how it would sound on my car:
http://www.summitracing.com/parts/WLK-17670/
Another I found was the Dynomax Ultra Flo 17227 (3"/2.5") but I am not sure how loud it would be:
http://www.summitracing.com/parts/WLK-17227/

I guess I can go ahead with the 3" outlets and just buy the individual pipes. I really don't want to buy a whole new catback, the money is a bit tight right now and we are facing the possibility of moving to another state.
I replaced my 80 series flowmaster single in dual out with a single in single out ultraflo....a lot quieter. Interior noise is very low. can have a normal conversation. It still sounds good too. I let someone else drive it down the road so I could hear it.
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Old Jan 30, 2011 | 10:03 AM
  #14  
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Re: Need help finding a quiet crossflow muffler

Originally Posted by 85_ZED28
Are 4th gen mufflers 3" in?
2.5 in/out...

...funny story. Bought my Z28 with a "hooker catback."

Turned out to be the factory catback, flowmaster 80 series, and hooker quad tips...
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Old Jan 30, 2011 | 10:05 AM
  #15  
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Car: 1987 Camaro SC, 1999 Z28
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Re: Need help finding a quiet crossflow muffler

Originally Posted by ninetyone
dynomax super turbo crossflow transverse muffler.
http://www.summitracing.com/parts/WLK-17227/

Last edited by Tobias05; Jan 30, 2011 at 10:10 AM.
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Old May 2, 2011 | 03:07 PM
  #16  
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From: Gulf Coast
Car: 1988 Trans Am GTA
Engine: 5.0 TPI
Transmission: TH700-R4
Axle/Gears: 3.27
Re: Need help finding a quiet crossflow muffler

Thought I would update on my post. I ordered the Dynomax Super Turbo 17670 which is a crossflow with 3" In/2x 3" Out.
The shop had to extend the intermediate pipe to fit this monster back there. The Muffler is definitely thick.
OK, so how does it sound? First consider my GTA has a Lingenfelter cam, Edelbrock TES, Catco Coverter, and now this muffler... all which affect the sound. Standing around the car at idle I can hear that cam sound from the pipes even more now, then that mellow deep rumble with it. Not loud at all. Inside the car at idle you can feel that deep rumble even more. On acceleration you can hear that nice deep sound but not throaty what so ever. On the highway I can hear more wind and road noise (and the rattles too) than I can the exhaust. I CAN FINALLY HEAR MYSELF THINK... and enjoy the music too
The car feels like a totally different machine. I guess because I don't hear the engine as much the car feels better in acceleration.

Overall... excellent choice for my application. Sounds very much like this Mustang which has the same Super Turbo muffler too.

Cheers!!! ~Ozzy
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Old May 2, 2011 | 05:22 PM
  #17  
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Re: Need help finding a quiet crossflow muffler

Glad you found something that you like! I ran a stock 4th gen muffler for awhile on my 82 they are 2.75 in and dual 2.5 out but I had a 3.5in I pipe with a cutout under the rear seat longtubes and no cat and it was a very uinique sound I thought I liked it though. Post videos of your new exhaust if you can.
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