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Lets talk mufflers.

Been running the typical magnaflow muffler. While it sounds good it is too loud to enjoy on long drives. I know I dont want a chambered muffler. Im thinking just a good old fashioned turbo muffler. My goal is to be able to run down the highway and not go deaf.

What are people running?

I'm working on the same thing. Current plan is to add a resonator or bullet style Magnaflow upstream from the current Magnaflow, but I'm interested to see what everyone likes.

I also need something thats small.

Justin wrote:I'm working on the same thing. Current plan is to add a resonator or bullet style Magnaflow upstream from the current Magnaflow, but I'm interested to see what everyone likes.

So I did some reading. I found that the straighter and shorter the tailpipe is after the muffler the quieter/mellower the sound. So for you add that resonator after the muffler if at all possible.

I'm running turbos

Also interested in what everyone is running for a muffler,
I'm not using any resonators at the moment and both mufflers (https://www.summitracing.com/parts/aph-6555) are at the very end of the exhaust. I really like the sound of them in town but on long drives its too loud . I'm planning on redoing the exhaust this spring once I do few changes to the suspension so it would be interesting to hear what's modifications/mufflers provide the best results for quieting down the sound.

And yes the mufflers are for a Chevy they were the only ones short enough to fit were the gas tank was lol

Here's what I'm planning to put in: https://www.amazon.com/gp/product/B0018 ... 3240e894a8

Rob, interesting about putting it at the end of the exhaust. If I've got room, I might give that a shot.

Justin wrote:Here's what I'm planning to put in: https://www.amazon.com/gp/product/B0018 ... 3240e894a8

Rob, interesting about putting it at the end of the exhaust. If I've got room, I might give that a shot.

Ultra Quiet? thanks for the lead I'll check into them

dang thats the shortest resonator ive seen. I might have to go with one of those also.

I know Crawlercreations has a quiet exhaust. Also JD's exhaust was quiet.

I just ordered one. Should be here tomorrow. I'll post up once I know more.

ZOSO wrote:dang thats the shortest resonator ive seen. I might have to go with one of those also.

I know Crawlercreations has a quiet exhaust. Also JD's exhaust was quiet.

I think crawler (Jason) is actually running two mufflers per side. Hopefully he’ll post up.

Kinder wrote:

ZOSO wrote:dang thats the shortest resonator ive seen. I might have to go with one of those also.

I know Crawlercreations has a quiet exhaust. Also JD's exhaust was quiet.

I think crawler (Jason) is actually running two mufflers per side. Hopefully he’ll post up.

Sound clip before and after for us lurkers ?

I am running the Magnaflow 2 into 1 muffler from the BC broncos kit. It's decently quiet because I'm still on a stock engine and stock manifolds. It also just barely fits with my 4 link and the tailpipe comes all the way out the back. It is really nothing special and would not likely be very quiet with any kind of decent engine power and/or headers.

Got my resonator put in. Found varying accounts of what works best, so opted to follow Rob's advice and put it as close to the end as possible. The system is shorty headers and 3" single pipe with a small, high flow cat right after the Y pipe and an 18" Magnaflow muffler. It's definitely quieter, but still has some solid rumble and the overall tone is both smoother and deeper. I lost a little of the crackle I loved while decelerating, but it's still there. At cruise, tire noise is louder than the exhaust. I'm still getting some resonance which I suspect is from the 3ft section of pipe between the cat and the muffler. For now, I'll leave it as is. Once it's linked I'll be re-lego-ing the entire thing anyway. Tomorrow it gets paint. Too shiny. I don't have a before clip, but here's the after:

https://www.youtube.com/watch?v=VA15jqa80bc

sounds really mellow. mine had a crack to it when you snapped the throttle. which made it loud.

I did finally decide on a muffler. Going to order it up along with all my pipes and stuff. Waiting on the BC shorty headers to show up.

Nice! What muffler did you pick?

Justin wrote:Nice! What muffler did you pick?

Well nothing now. I cut a box the size of the muffler and can not get it to fit anywhere. So back to the drawing board. I need a round muffler that is 6" diameter or less.

There is zero room with the links and brackets back there.

Justin wrote:Got my resonator put in. Found varying accounts of what works best, so opted to follow Rob's advice and put it as close to the end as possible. The system is shorty headers and 3" single pipe with a small, high flow cat right after the Y pipe and an 18" Magnaflow muffler. It's definitely quieter, but still has some solid rumble and the overall tone is both smoother and deeper. I lost a little of the crackle I loved while decelerating, but it's still there. At cruise, tire noise is louder than the exhaust. I'm still getting some resonance which I suspect is from the 3ft section of pipe between the cat and the muffler. For now, I'll leave it as is. Once it's linked I'll be re-lego-ing the entire thing anyway. Tomorrow it gets paint. Too shiny. I don't have a before clip, but here's the after:

https://www.youtube.com/watch?v=VA15jqa80bc

That sounds really nice! And gives me hope I was starting to question my decision on running headers

It sounds good and is pretty liveable as is. The configuration im awning to run after it gets linked will move the muffler upstream about a foot and hide the resonator better. Should be almost ideal.

I would like to throw something else out there for you guys. My last bronco had a pretty nasty 351w that I just could not quiet down well. I had dual 50 series (I think)(biggest I could fit and was still stock type suspension) flowmasters, and I even added short cherry bombs to help but it was pretty much unbearable for daily driving. Sounded good and mean but too loud. So I made my own set of what's linked here but would recommend buying instead. What I made worked really well so I could stand daily driving it again. I installed them as far into the tailpipe as I could. 10/10 would recommend them. This is just a general link, they make them in a bunch of different sizes.

https://www.summitracing.com/parts/cci- ... dQQAvD_BwE

ZOSO wrote: Also JD's exhaust was quiet.

Mine? Key word "WAS". I don't have any details on what muffler it was, but Joe installed it before I bought it from him. I know it was an oval shape with offset inlet/outlet. But once I put my clocked-flat Atlas in there and dumped the exhaust out the rear quarter in front of the tire, there was little room. Mine is quite loud now. Probably would drive most people on a DD.

I wonder what a catalytic would do for muffling noise? I'd like to try and help reduce fumes with one and if it helps noise, then that would be a bonus.

Mine didn't seem to make much difference with noise, but I'm running a small, high flow cat. Fumes are 1000% better. Part of that is EFI, but the cat helps. Still getting a small bit of smell till the cat is hot enough to do anything.

ZOSO wrote:sounds really mellow. mine had a crack to it when you snapped the throttle. which made it loud.

I did finally decide on a muffler. Going to order it up along with all my pipes and stuff. Waiting on the BC shorty headers to show up.

When I recently went from stock manifolds to shorty headers (WH/JVA I think), I really didn't see any difference in sounds. Even with switching from 2 or 2-1/4" to 2-1/2" up front. Mine is a little louder at idle when cold and then quiets at operating temps. I did also change the tail to dump out the back like Chris's red one instead of the side. I got tired of dinging the pipe out the side on rocks! Seems to be a little quieter while on the road.

Justin wrote:Mine didn't seem to make much difference with noise, but I'm running a small, high flow cat. Fumes are 1000% better. Part of that is EFI, but the cat helps. Still getting a small bit of smell till the cat is hot enough to do anything.

Sounds like it's worth a try!

TOOLMAN wrote: I did also change the tail to dump out the back like Chris's red one instead of the side. I got tired of dinging the pipe out the side on rocks! Seems to be a little quieter while on the road.

Off topic, sort of.

I'd like to see some pics of tail pipe locations out the back. When mine was there I had some trouble with dragging it while climbing steep obstacles.

I need to run my new exhaust and out the back would probably be my best route at this point but don't want to smash it flat again. I don't see a good route out the side due to my leaf spring location.

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I'll be going over the frame rail, down the outside of the frame, and out through the body once mine is linked. I could do it now except for where my shock hoops are located.

Justin wrote:I'll be going over the frame rail, down the outside of the frame, and out through the body once mine is linked. I could do it now except for where my shock hoops are located.

The only place I can go over my frame rail is in the engine compartment (no body lift). I might have to look at that option more closely. Seems like it would be a pretty convoluted run get from the header out over the frame.

I can go under the frame between my radius arms and front spring hangers, but I'm planning on belly skid plate there, and it would seem prone to damage. Or I can possibly go under right next to the rear axle bump stop, but it would be tight.

Or I can put it back where it was under the frame rail, dumping out right at the rear bumper. It just got smacked a couple times and with the truck becoming a fairly dedicated crawler, I can only see it getting frequently smashed.

I've seen a few federwell headers for EB. No idea if they were custom. I love my body lift.

You could tuck it up as high as you can in the back, and then have it turn down at the last few inches where the outlet would be above the rear bumper for protection. Or you could do nearly the same in front of the rear axle. Just have it dump before it reaches the inside surface of the rear tire.

My old blue one had duals out the back that didn't last long. This white one dumped out in front of rear tire, that too didn't stay round long. I am mostly happy with it exiting thru the body now aside from some rattling against the bezel I made until it heats up. I've still scraped it again rocks, but it's never gotten crushed.

I think it would be awesome to build a device that would sandwich the body and have a collar on the inside that you could attach a flex pipe too. Then you don't have a pipe floating inside a bezel to rattle. But that could create heat issues on your painted surfaces. Perhaps you could double-wall it like a lot of diesel exhaust tips are?? Hmm...that would be pretty easy to adapt to my setup if I could make it short enough.

Gunnibronco wrote:

TOOLMAN wrote: I did also change the tail to dump out the back like Chris's red one instead of the side. I got tired of dinging the pipe out the side on rocks! Seems to be a little quieter while on the road.

Off topic, sort of.

I'd like to see some pics of tail pipe locations out the back. When mine was there I had some trouble with dragging it while climbing steep obstacles.

I need to run my new exhaust and out the back would probably be my best route at this point but don't want to smash it flat again. I don't see a good route out the side due to my leaf spring location.

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A little, but I did say it made it a little quieter; which was on-topic. Or maybe you're saying that your post is off-topic.

I'll try to snap a picture tonight.