building '41 ****** Americar replica with LS376/480 + headers. need QUIET MUFFLER. Prefer 4" ROUND with centered 2 1/2 in/out. Stainless preferred. PLEASE HELP WITH COMMENTS AND SUGGESTIONS

 

1 or 2 ? For true dual or 2 into 1 ?

 

Two mufflers. One for each side

 

Magna flow is pretty quiet. They might have the size you want.

 

I agree I have a mangaflow on one of my trucks and it’s too quiet. But it’s still being run through cats.

 

Ive been researching muffler to death because my turbo car is too loud. I settled on Dynomax super turbo's because they seem to flow well and are rather quiet. Arrives today. Can let you know the difference.

 

+1 for Magnaflows they are super quiet.

 

Walker stock replacement will be the most quiet, not sure what they have for 4”

 

i went from magnaflow to a borla pro xs (little more expensive but you get what you pay for). The magnaflow wasnt bad but it had a more low or bassy tone that would carry and rumble inside my house. The borla got rid of the bass tone and reduced volume just a little. It was enough that my wife no longer hears when i crank the car or leave in it. I may have videos of both at idle....lemme look.

 

heres the magnaflow....
heres the borla

 

With a 4"OAD you are going to be restricted heavily and will likely never truly have a quiet car
Best thing you could do is shove the longest 4"OD glasspack you can in it on each end. Cats or bullet mufflers off the headers might help as well. If you can run a dynomax super turbo or hooker aerochamber muffler those are better options for sound suppression.

 

Walker has a quiet flow. But I don’t know if they have round