Muffler recommendations please

[GJS]

I had Flowmasters on my 68 Monaco nice throaty idle .. it was like having no muffler at all when I got on her.

Don't think I'd go that route with my 67 but i've got some time to figure that out ... assuming I don't blow whats on there up this weekend ..

 

[tbm3fan]

Just so one knows what the difference between the 13" and 20" Dynomax mufflers it had nothing to do with loudness. It was unbearable drone. If the car was sitting in the driveway or at freeway speed it was fine. However, it was impossible to drive between 30-45 mph due to the drone emanating from under the floor pans. It was truly annoying.

 

[69 300 vert]

Y'all are forgetting about the Street HEMI muffler! Which was OEM stock equipment on the '69 Polara 440/375 police cars. The only C-body application.

Shorter than the normal C-body muffler, but the same case width. Similar in sound to the prior "best hot rod choice" Corvair Turbo muffler. Default mode = Walker OEM replacement.

CBODY67

Those are an excellent choice. They have a nice burble at idle, just enough to let you know they're there at cruise and a nice bark at full throttle.

FWIW, I noticed TTI's C body listings are blank, discontinued also?

 

[bajajoaquin]

Y'all are forgetting about the Street HEMI muffler! Which was OEM stock equipment on the '69 Polara 440/375 police cars. The only C-body application.

Shorter than the normal C-body muffler, but the same case width. Similar in sound to the prior "best hot rod choice" Corvair Turbo muffler. Default mode = Walker OEM replacement.

CBODY67

What is the manufacturer and part number for that? Hear that as a response a lot, but never saw a listing to a specific muffler for purchase.

Regarding TTI not having C-body exhaust (sorry, can't get it to multi-quote over two different pages), I'm not sure what you're seeing, but their website still shows 2.5" systems as far as I can tell.

http://www.ttiexhaust.com/MoparClassics-Exhaust/Exhaust_Syst_MW.htm

 

[CBODY67]

The Street HEMI muffler was the OEM Chrysler muffler which was used behind the 426 HEMI in the late-'60s B-body Hemi cars. By this time, the NOS ones have been long ago purchased for concours restorations (where part number stampings and date codes for the model year matter a lot) and used to go for $500/pair.

Walker Exhaust and others had replacements for those applications. NAPA used to have Walker Exhaust items, too, as their part number matched the Walker part number. I found a pair of Maremonts several years ago, but they also had a Ford application, too. They're still in the boxes.

The Corvair Turbo mufflers were more "trashcan" in their body shape than most other mufflers. The Street HEMI mufflers had a normal Chrysler body shape, just shorter and with the appropriate pipe sizes. You can download a normal Walker catalog and also the DynoMax catalog. LOTS of neat stuff in them, including factory-style hangers.

CBODY67

 

[bajajoaquin]

In other words, "get street Hemi mufflers" translates into "get the Walker mufflers people are recommending"

 

[challenger]

I'd love to get the "Hemi style" Walker mufflers but I can't find anything online about them. I will continue to try to do so as I have not done a ton of research on these specific mufflers.
Thanks

 

[bajajoaquin]

Sounds to me (heh heh) like the Walker part number referenced up above is the closest there currently is. I've seen that part number referenced in the past, and it's most likely the one you're looking for. If there's no real "Street Hemi Muffler" available, that's the one you're looking for.

 

[challenger]

Is the stock/original pipe diameter 2.5"? The shop that did these mufflers used inlet and outlet size of 2.25"
Also the length of the above mentioned Walker mufflers is 29" and I see the muffler shop installed a long length of pipe from these 13" units to the original pipe. I guess this means the original mufflers were in the 29" length range???

 

[Big_John]

Is the stock/original pipe diameter 2.5"? The shop that did these mufflers used inlet and outlet size of 2.25"
Also the length of the above mentioned Walker mufflers is 29" and I see the muffler shop installed a long length of pipe from these 13" units to the original pipe. I guess this means the original mufflers were in the 29" length range???

Original size is 2 1/4".

Chances are that muffler was a generic piece out of their stockroom.

 

[cantflip]

Is the stock/original pipe diameter 2.5"? The shop that did these mufflers used inlet and outlet size of 2.25"
Also the length of the above mentioned Walker mufflers is 29" and I see the muffler shop installed a long length of pipe from these 13" units to the original pipe. I guess this means the original mufflers were in the 29" length range???

If you are following my PN... I started with a custom exhaust and rattling mufflers... but you can measure what you have to figure out a match... straight pipe cuts down too, if yours already had little ones.

 

[challenger]

If you are following my PN... I started with a custom exhaust and rattling mufflers... but you can measure what you have to figure out a match... straight pipe cuts down too, if yours already had little ones.

Yes I am looking at the number you mentioned. These have an inlet and outlet of of 2.5". Did you use some adapters to neck down the pipes? I am ready to order a set of mufflers but I would like to make the installation with a minimum of complications. I don't necessarily call using adapters a complication other than if they are not on hand IYKWIM.
I am leaning toward a set of walkers that are shorter but the ones I see are actually more $ than the longer ones. Supply and demand issue I imagine. The 18381 are probably much more widely used and therefor less $.

 

[bajajoaquin]

Measure what is actually under your car and order to fit that. Looks like a 2.25" single inlet/outlet is part number 18230.

 

[cbarge]

Whatever mufflers came with the C body TTi kit sound awesome and no drone at highway speed.
IIRC, Dynomax Super Turbo #17748

 

[MoPar Maniac]

Come on guys. Thrush/Hush Thrush!

 

[cbarge]

TTi still sells C body exhaust.
I deal with them at work,and bought 2 systems for myself over the years.

 

[78Brougham]

Just go to a decent custom exhaust shop, they'll hook you up.

 

[cbarge]

I agree,anybody can get the mufflers.

 

[cantflip]

Yes I am looking at the number you mentioned. These have an inlet and outlet of of 2.5". Did you use some adapters to neck down the pipes? I am ready to order a set of mufflers but I would like to make the installation with a minimum of complications. I don't necessarily call using adapters a complication other than if they are not on hand IYKWIM.
I am leaning toward a set of walkers that are shorter but the ones I see are actually more $ than the longer ones. Supply and demand issue I imagine. The 18381 are probably much more widely used and therefor less $.

Don't match mine, I have 2.5" pipes on that car...

Measure what is actually under your car and order to fit that. Looks like a 2.25" single inlet/outlet is part number 18230.

Thanks for doing the legwork,@bajajoaquin . @challenger ... it it pretty easy to measure what space you have and existing pipe diameters if you are saving good pipes... don't buy too short or you'll be patching in a length of pipe from pepboys... if you find something a bit longer than what you have, make certain the pipe is straight where you need to trim.

I have 2 tools from my shop days that make exhaust so much easier to deal with...

this one helps undo the deformation caused by the stock type clamps.

this one helps flare the end of the pipe a little in or out to make fitting easier... I still damn near killed myself doing this work on a pair of ramps... I'm too old and fat for this crap anymore.

The suggestion to just pay a exhaust shop isn't really a bad one.

 

[challenger]

I measured mine and the pipes are 2-1/4" in and out. The mufflers I get will need to be longer than what'sin it now. The only issue is tthe left side outlet is right up against a bend so I'll need to grind off the weld in order to save the piece of straight section currently going into the blown up muffler.
I will look for a local muffler shop before doing this myself. I don't have a lift so removing the weld bead will be a hassle. Truthfull I don't like others ddoingwork