What kind of muffler do you use?

[jim13mac]

I am looking to replace my old mufflers and was wondering what everyone else uses. I am not going to go the concours route yet as I drive my car (67 GT350). I currently have a straight through exhaust system with headers. Looking for something with a bit of bark. Any suggestions? Flowmaster, Dynomax, others...

[skidado]

I haven't bought mine yet, but will probably go for 2.5" MagnaFlow in Stainless. I am running Tri-Y headers (also on a '67 GT350).

David

[Shelby~gt350#3000]

i was considering this set up from MUSTANGS UNLIMITED...Looks preety sweet..check it out,

www.mustangsunlimited.com

PRODUCT SEARCH # 17281

Im not a single muffler fan and I like a little rumble to my exhaust system. Enjoy.

Jim

[MRP_GT-350]

I personally am a fan of an exhaust that shakes the pavement, so I chose Hooker Supercompetition long tubes through 2.75 inch pipe, x pipe, and 1 chamber race flowmasters. While I'm sure this setup is not something that a lot of GT350 owners would want, for those who love the rumble its definitely transformed my car to sounding as much like a big block as any 289 ever will.

[s2ms]

I'm running 2-chamber FlowMasters on my 66 and love the sound. Probably more tame than the 1-chamber race mufflers but still grab your attention.

[rsimkins]

I have two-chamber Flow Masters on my 500. Because I also have a Holman Moody high overlap solid lifter cam, I have to be careful in the neighborhood so as not to scare small children or set off car alarms.

[66shelbynz]

Originally Posted by s2ms

I'm running 2-chamber FlowMasters on my 66 and love the sound .

i run the same setup on my '66. Sounds great inside and out and no horrible drone like you get sometimes at certain speeds with other mufflers.

[crzy4shelbys]

Originally Posted by jim13mac

Looking for something with a bit of bark. Any suggestions? Flowmaster, Dynomax, others...

You're going to have to define "bark". I don't have a Shelby, but my '65 fastback was running a pretty well built street motor and I was running Doug Thorley Tri-Y headers and 24" glasspacks with side exiting exhaust. That's what I consider bark, but maybe you're looking for something a little more tame. I used to be able to set off car alarms by running up the RPM's in first gear and driving close to the parked cars!

The fastback is torn down right now to be redone. I swapped the exhaust to my '65 GT coupe, and it sounds completely different. I already knew, as I'm sure everyone on here does, that the motor makes a huge difference in the way the exhaust sounds, but wow! Night and day! The coupe sounds throatier, but nothing like that system sounded on the fastback. The swap is only temporary because the coupe's previous owner had put together a pretty awful exhaust system, complete with cheesey Pep Boys exhaust tips. I had to get it off of there just to uncork the motor and see what it had (not much). It does look pretty silly, though... side exiting exhaust on a factory GT with two empty holes in the rear valance.

Anyway, if you want something really raspy, I loved the glasspacks, but they're not fun on long drives if that's how you plan to use it.

[jim13mac]

You're going to have to define "bark".

OK. I am running a pretty aggressive Isky cam with headers and 2 1/2 inch pipes all the way back. The mufflers on the car are 20+ years old. The car is pretty loud, to the point of making it hard to talk normally at highway speeds. However I am always asked what kind of mufflers I run because everyone really likes the way it sounds. There is nothing on them indicating what they are, so I am guessing they are some cheapo ones that have totally worn out. All that is OK with me, however the mufflers are to point of deteriorating and will probably disintegrate to nothing soon. I would like to keep the loud sound and was wondering if the 40 series flowmasters would give me a similar sound. I have heard a number of cars with the 40 Delta series mufflers and was not impressed with the sound.

[crzy4shelbys]

Sounds like you and I have similar taste in exhaust. I've always thought the Flowmasters had too mellow of a sound. I really like the crisp, raspy sound of glasspacks.

Flowmaster describes the 40 series as the most aggressive sounding, but they also say they give that "Flowmaster sound", which is very popular now, but not the sound that I personally like. Having not heard them in person, though, I guess I'm not much help to you. Sorry.

[shlby66]

I currently use 427 Cobra LoBak Mufflers in a custom 3" side exiting system.
It has a great sound ( understand, I'm partially deaf, so my wife says ) that
I enjoy. Especially after driving thru a toll booth and running next to the concrete barrier while coming up thru the gears...sweet!

[s2ms]

Originally Posted by jim13mac

I have heard a number of cars with the 40 Delta series mufflers and was not impressed with the sound.

The FlowMaster Delta 40 series is what I'm running on my 66 and I'm very happy with the sound, but it does come down to personal preference. The sound is plenty loud and aggressive, I am running an pretty aggressive Lunati cam and 347 cubes so assume that makes a difference too.

[jim13mac]

Just thought I would give an update for those that are interested. When the old mufflers came off, they were completely shot as I expected, could look straight through them with nothing to baffle the sound. For the replacements I went with the original 2 chamber Flowmaster 40 series, not the 40 series delta flow. The new ones sound MUCH deeper and quite a bit quieter at idle. Putting my right foot down heavy they still make a lot of noise but not the same tone. I like the sound, but it is not quite the same, now it sounds pretty much like everyone else. It is a bit easier to talk to passengers now, which can be a good or bad thing I suppose. Interestingly enough it does seem that I have a bit more low end power now. Maybe because I have a bit of back pressure now?
Jim