Done some work to my custom 500 this weekend and while listening to the motor on high idle I noticed the magnaflow mufflers I have on it seem to be a little more noisy then I like,other then the usual turbo mufflers just what quiet high performance mufflers are available these days. I have not paid much attention to mufflers over the last few years and have two vehicles that I would like to get a little more quiet as my tastes have changed since getting a little older.
Flowmaster 50 Series are a great choice if you like a subdued "muscle car sound". I have them on my '64 El Camino daily driver. Throaty when you put your foot in it, but otherwise very mellow.
if you have the coin, Burns Stainless makes an amazing liftime muffler. The performance is all dependent on the size. Go bigger = quieter. They are repackable.
I have Flowmaster's on the wagon and my Deuce pickup. Porters on the 32 sedan. The porters sound great but they are a lot louder. HRP
If I can remember correctly the Magnaflows I have on the car were quiet at slower speeds when they were new so they might be shot internally so time to look up the receipt to see if they have a life time warranty.
Walker turbo mufflers, I bet your non chain store exhaust shop has them in stock, if not summit and others do. Longer/bigger equals quieter. Walker and dynomax are the same company. I've run various versions of these on a lot of cars.
Run a big bore single exhaust like we do in "Road Racing". It doesn't drone at part throttle cruising. If you must run dual exhaust , split it into two after the muffler [ or run an equalizer ]
I will look into the hemi mufflers and the mufflers I have on it are now sounding like glass packs and tired of the noise they make.
I am a fan of the Dynomax Super Turbo mufflers. I like the quiet mello tone. And they are reasonably priced. I have them on a couple of cars.
Do you have an H pipe or X pipe on it, I added on my El Camino and it killed some of the noise, mostly WOT.
^^^^That! I still like the sound of the original Corvair turbo mufflers. Went through several sets of the Walker versions over the years. A moterhead buddy, who's dad owned a parts store first turned me onto them in the early 70s. Still have a set out in the garage on an OT ride. Best sound ever for the $ in my book.
Here is another design for you to consider. They are called Flo-pro baffle packs. They look like a regular glass pack but have none of the usual glass pack characteristics. Without any packing to burn out they have a consistent performance through their life. We had a set on my son's SBC powered 71 GMC pickup and it was a very sweet sounding exhaust. It was not loud but sounded very nice when you got onto it. http://www.flopro.com/baffle.html
If you want to tone them down a little bit yet, just do what all the factorys did in the late '60's. Just add a smaller muffler at the rear of the vehicle, any small straight through muffler will take a little more noise out. In the '60's they were called resonators. Any small, cheap, super short muffler will work.
I never thought about a resonator and that might be the easiest way yo go,I will have to look at the pipes and see if I can add them.
thrush (dynomax) has some really long glass-packs that are pretty quiet. summit's print catalog lists one that's 31" long with a 26" case. i think you might find something even longer, if you have the room. also, i've used the dynomax "super turbo" mufflers--they're quiet until you put your foot in it. (too quiet for me, though)
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