Quiet yet good performing mufflers
Thread Starter
Burning Brakes
Joined: Apr 2017
Posts: 877
Likes: 80
From: Frederick MD
Quiet yet good performing mufflers
All,
I bought a 1975 this spring and have been driving it and enjoying it a lot, with one exception - the previous owner put Flowmasters on it that are very loud right around 1000-1500 rpm. The car has a non-original fairly strong 350 so I expect it to be a little bit loud, but I put a very nice 383 in my 69 with stock mufflers and I like how quiet it is. I have owned corvettes continuously since I have been 23, now 48 and perhaps entering the grumpy old man stage of Corvette ownership.
So my question is, can anybody recommend a good performing yet quite muffler for my '75?
Thanks,
Scott
I bought a 1975 this spring and have been driving it and enjoying it a lot, with one exception - the previous owner put Flowmasters on it that are very loud right around 1000-1500 rpm. The car has a non-original fairly strong 350 so I expect it to be a little bit loud, but I put a very nice 383 in my 69 with stock mufflers and I like how quiet it is. I have owned corvettes continuously since I have been 23, now 48 and perhaps entering the grumpy old man stage of Corvette ownership.
So my question is, can anybody recommend a good performing yet quite muffler for my '75?
Thanks,
Scott
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
I have a set of Magnaflows on my car a '72 with headers and H pipe behind the trans....
It's really quiet and my car is a convertible....and believe it or not, I can see through the muffs....go figger.....
Can I hear them/engine...yes, is it loud enough to mess up music?? no...not even close....and I not talking some stupid loud sound system either....
It's really quiet and my car is a convertible....and believe it or not, I can see through the muffs....go figger.....
Can I hear them/engine...yes, is it loud enough to mess up music?? no...not even close....and I not talking some stupid loud sound system either....
Race Director
Joined: Sep 1999
Posts: 11,361
Likes: 383
From: Plano TX
To get a quiet high flowing muffler you need a large and long case. So look for the largest muffler you can physically fit. I went with Borla XL series (straight through) that I think are 18" long or so.
Safety Car
Joined: Apr 2006
Posts: 4,057
Likes: 421
From: BC
I found that the exhaust and muffler setups from Corvette Central are as close to stock as you can get in appearance and sound. They even have an option for the one piece muffler and exhaust pipe like stock for people wanting OEM looking systems. They are not expensive, fit really well, are good quality and easy to install. I have their complete systems on my 69 and my wife's 78 and am very happy with both. The 78 exhaust is 12 years old and still looks new with no rust or deterioration. You can buy any of the parts you need or the complete deal.
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Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
nothing better than a fast car that is whisper quiet can have your fun and dont have to worry about the wrong guy waiting for you a block away
most short cased, straight through or chambered mufflers will drone and increase noise period
Last edited by cv67; Oct 17, 2017 at 09:10 AM.
Racer
Joined: Jan 2012
Posts: 321
Likes: 16
From: Ontario
I bought them because I wanted something quieter than the Camaro, haha. Guess I really need a full exhaust.
Did you also get the pypes full exhaust kit? How does it fit?
Le Mans Master
Joined: Mar 2004
Posts: 7,502
Likes: 1,509
From: Little Rock AR
My plan is to put stock '74 mufflers on my true duals. They are designed to sound stock without the use of a cat and they are still shaped like the originals were on my '80 so they will not look out of place.