School me on mufflers

Keith1138

Keith1138

Well-Known Member
Joined
Nov 18, 2015
Location
Harrisburg NC
I dont know much about exhuast and mufflers. I dont like extremely loud exhuast but dont want to sound like a honda or lawnmower. Mine has started sounding like a ricer if i am under 2,000 rpm in first gear. Whats out there and what should i look at?

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What exhaust do you have in it now? Magnaflow usually makes a good product, both for efficiency as well as sound. I know they're a bit pricey when compared to others, but it's worth it.
 
An exhaust with packing, like magnaflow, can have a more 'muffled' tone, than a baffled raspy tone like flowmaster. ive also heard that packing mufflers are more prone to rusting out after a good decade. But for the nominal cost I dont think its a big deal either way.

I personally prefer the more muffled tones in magna and borla
 
ckruzer said:
I personally prefer the more muffled tones in magna and borla
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Same here. I even sometimes tire of the "cackle" of chambered mufflers on a healthy V8. Hence why I have a packed pair of mufflers (turbo mufflers) for my Heep when I finally get to that stage of the build.

Ah, Borla...that was the other name I couldn't think of. Good add.
 
Scooter402 said:
What exhaust do you have in it now? Magnaflow usually makes a good product, both for efficiency as well as sound. I know they're a bit pricey when compared to others, but it's worth it.
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I just have what ever cheap muffler the dealership i bought the jeep from threw in it.

I dislike the sound flow masters makes or the ones ive heard.

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I have a magnaflow 2.5" round can muffler on my 4.0 jeep and its too loud to me now. My plan is to add a chambered muffler after the packed muffler if I ever get it back together. Looking for that "Yeah, i'm 32 but Im still a car guy" sound.
 
Couldn’t hear my Jeep running on the trails with the stock setup so I went with flow master super 44 and I like it and I don’t think it’s to loud. Borla and magnaflow are both good quality also.
 
Yeah i want to be able to hear my jeep but not be annoying to others loud.


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High flow generic cat, 2.5” pipe into a magna flow (quieter) or a flowmaster super 44 (louder) and 2.5” all the way out the back. I have had both and liked them both. Magna flow is Quiet at highway speeds but a bit of voice when you want to stretch her legs a bit. The flowmaster just steps the tone up a bit across the board. A 4.0 will never have that V-8 gurgle.
 
Wrong motor, I know, but I’ll add anyway. I have a single chamber flowmaster on a 4.3 V6 Chevy and it sounds awesome at idle. My biggest complaint is the “gurgle” @skyhighZJ mentioned. Low range, low gears, every time you let off the gas. Down hill engine breaking, beyond annoying. I’ll be going back to a packed muffler before too long.
 
I have a Dynomax on my 4.0 that someone gave me years ago. When I got my Jeep it had no muffler, and this was free. It doesn’t sound bad but the main thing I hate is when I had it put on the guy didn’t run it out the back. It just dumps above the axle, which resonates inside the Jeep and I get real sleep when I move slower for some reason...

Mine isn’t real loud, but has a nice healthy roar between 3500-rev limiter, where it spends a lot of time according to everyone at Big Creek this past weekend :rockon:
 
@Jason W. who is the guy in CTB that has the white Duramax std cab and the LJ Rubicon? Locked his keys in his truck at the Janurary ride...

Now that is one awesome sounding 4.0, I loved they way his Jeep sounded!
 
Im seriously considereing just getting a basic glass pack. Im also going to replace my tail pipe so it solves having to fix the hangers on mine.

Anyone have any experince with basic glass packs?


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Keith Odom said:
Im seriously considereing just getting a basic glass pack. Im also going to replace my tail pipe so it solves having to fix the hangers on mine.

Anyone have any experince with basic glass packs?


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@obullfish mentioned it earlier. I had sidepipes on two separate engines in mine, which are essentially glass packs. They do sound great, and aren't really too loud at all until you're getting in it good. The longer the glasspack, the "quieter" it will be. Don't get me wrong, it won't be quiet because they're a straight-through design... but it will likely be better than a chambered muffler. I say go for it. Nice and cheap, and effective as well. Just make sure to route it all the way back like @77GreenMachine said.
 
I really like the the DynoMax Ultra-Flow Welded mufflers. They're a straight through design so they flow well, but they sound awesome. I've got a 3" dual in/dual out with an internal crossover. That part made a huge difference in power and sound on my setup.

Best thing I ever did was get rid of the Flowblocker 40 series I had on it. They sounded good, but damn they killed the power.

Don't let Scooter tell you anything about his Jeep...at idle it was difficult to breathe next to his rig! It was straight up loud :D
 
Croatan_Kid said:
Don't let Scooter tell you anything about his Jeep...at idle it was difficult to breathe next to his rig! It was straight up loud :D
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Sshhhh! Don't give away all my secrets...so what if it made your eyes water...It just made me happy it was alive! :lol:
 
Flowtech red hot and a Walmart fart can
 
We have a Flowmaster 50 on one of our Jeeps. It's built like a tank. Gets dragged over stuff, gouges and scratches, doesn't care.

I'm not really a fan of how it sounds. It's damn loud above 3k, drones at part throttle, and tends to sound like a fart can on a Honda. The 4.0L just doesn't have the unequal-pulse burble that V8s have. It sounds like a straight six. It pops on decel, but I don't mind that.

The other Jeep's OEM muffler is on its last legs. I'd love to find something with a similar build quality to the Flowmaster. Does anybody know how thick something like a stainless Magnaflow is? Would hate to drop $100 on a new muffler just to peel it open the first time out.

I guess I could always weld a piece of 1/8" to the bottom of it.... :lol:
 
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