What muffler to use for a quiet syestem?
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Senior User
Joined: Sep 2004
Posts: 197
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From: Eagle Rock CA
What muffler to use for a quiet syestem?
I leave for work around 4:30 a.m., just about finished with my electrical and want to install a quiet muffler system. Seems like I saw an article in Classic Trucks or Custom Classic Trucks but unable to find it. Anybody have any suggestions on what to install? My wife would appreciate it.
Hotshot
Joined: Oct 2004
Posts: 15,882
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From: Durham NC
I would say any standard baffle type replacement muffler, Walker etc. should do the trick, for super quiet you might also add a pre-muffler expansion chamber, sometimes called a resonator (looks like a small muffler), as used on a lot of luxury cars today. Stay away from any of the aftermarket "performance" mufflers if you want your wife happy.
Hotshot
Joined: Oct 2004
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From: Durham NC
Originally Posted by Randy Jack
Ditto what AX said. Run the two pipes into one, then all the way out the back and it will be real quiet.
Postmaster
Joined: Apr 2004
Posts: 3,005
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From: Santa Clarita
I had the Magnaflows on my truck, not sure if Randy heard it at the Orange Co car show we went to, but everyone there was in agreement that the mufflers were very quiet when I started the truck up. I even had them cut off at the rear axle with turndowns. You can barely hear them from the interior and really have to listen carefully on the outside. I believe they are 3 chamber and longer than your normal aftermarkets which quiets the muffler down quite a bit. I took them off and put Flowmaster on, but I like the loud sound better and the Flowmaster are now too quiet for my wife.
Mountain Pass
Joined: Jan 2003
Posts: 226
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I have the 70 series Flowmaster on my truck and I think it's great for being quiet, I have to fire it up before 6 am in the morning and I don't have to worry about the neighbors waking up at all. Very quiet at idle, good sound under load.
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Elder User
Joined: Feb 2006
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I have two 3" 3 chamber flowmasters on my daily driver and its pretty quiet until I put my foot in it, and even then its not too loud. A fellow I work with has a magna flow muffler on his truck and it is a two in two out 2.5 muffler and it is as quiet as the stock system, but just a deeper tone.
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Hotshot
Joined: Oct 2004
Posts: 15,882
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From: Durham NC
That would depend on the baffle design, but even if a single chamber with two inlets and two outlets (the two outlets in a single chamber design would not have any more effect than a single outlet of the same area, more for show at that point) it is too little too late to have much effect as a crossover, since at that point the gasses are expanding many fold. I believe I read once that the crossover should be ~1/3 of the way from the exhaust ports to the muffler to be most effective.
Elder User
Joined: Feb 2006
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In my buddies truck the 2 in 2 out magna flow muffler doesn't have chambers in it. Its crazy I honostly do not understand how it is so quiet. if you looked in the left pipe on the front of the muffler it goes streight through to the right side of the back end of the muffler kinda like an X inside the muffler. I told him it was gonna be loud as hell before he put it on but to both of our surprise it was pretty darn quiet. The muffler is on a 3/4 ton 99 GMC with a 350 in case you were wondering.
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