Found the source of my bottom side noise.

[1967coronet]

End of summer my old 67 developed a vibration type noise or buzz without any felt vibration.
I had it on our hoist a few times trying to track it down , car running ect.
All hangers are rubber and good, checked for any places exhaust would or could be touching body , springs , tank.
Walking under the car for the heck of it I slapped both flowmaster 40s lol right side has a piece loose inside rattling around.
Mufflers are several years old but no external rust. Thought I would share because tracking down a ( noise ) can be frustrating.

 

[khryslerkid]

Ahh yes, the vibrating, loose baffle!

 

[Aron Gleason]

Muffler bearing lol

 

[OH71RRunner]

I hate it when that stuff happens. Glad you were able to find it before it drove you too crazy.

 

[Kern Dog]

Does the car pull hard to the LEFT ?

 

[Frank Mopar]

Muffler bearings!! First verified instance I ever heard of.

 

[Darter6]

Yep, My Flowmasters did the same. Broken internal welds. No more Flowmasters for me.
Never did care for their sound.

 

[1967coronet]

Muffler bearing lol

Lol ,
You would think they would put a grease zert on those.

 

[fratzog lover]

Sounds like low quality production rearing it's ugly head. Sometimes you dont get what you pay for.

 

[Ironbuilt]

Most of the time, you don't get what you pay for.

Fixed it for you @fratzog lover

 

[Kern Dog]

Lol ,
You would think they would put a grease zert on those.

Or a Z E R K.

 

[moparedtn]

Or a Z E R K.

 

[HALIFAXHOPS]

Poor lubrication schedule it sounds like to me.

 

[1967coronet]

I need to pick a set of mufflers now.
I like the flowmaster 40 sound .
I have triY headers and 2 1/2 " pipe all the way to the bumper.
Ready to try a different brand though , still want to stay with a loud sounding set.
Borla, Dyno Max ?

 

[HEMI-ITIS]

Got me a pair of hookers

 

[Billccm]

I've had flowmaster baffles fail twice.
On advice of my exhaust shop I went with cheapo summit racing knockoffs. So far I'm happy.

 

[33 IMP]

Got me a pair of hookers

A blond and a brunette?

 

[33 IMP]

I've had flowmaster baffles fail twice.
On advice of my exhaust shop I went with cheapo summit racing knockoffs. So far I'm happy.

Thats what i was gonna suggest. Tree'd again!

 

[HEMI-ITIS]

A blond and a brunette?

Not quite,,,,,,,,,Hooker Maximum Flow Mufflers - Free Shipping on Orders Over $99 at Summit Racing

 

[33 IMP]

Not quite,,,,,,,,,Hooker Maximum Flow Mufflers - Free Shipping on Orders Over $99 at Summit Racing

I had a pair of the hooker aerochambers on my cortina. They were the cheapest real non-bullet 3 1/2 mufflers i could find. They are twice what i paid now. I had to get used to the sound, but i ended up liking them a lot. But i still like the flowmaster sound better.