Do Magnaflows Get Louder Over Time? (1 Year Later) 

Magnaflow Muffler: amzn.to/2qy2BVd

Wow, the muffler is much louder after a year. It definitely sounds better now, it had too much of the muffled fiberglass sound.

It just hit me that that's the best sounding 5.3 LS I've heard so far

I love the 1 year later sound that's exactly what I'm looking for. Thanks for the video.

When do they start selling the “Year old” version? Life long Flowmaster guy, immediately jumps on the MAGNAFLOW train.

Sounds badass. It's got an edge to it now.

Yes, indeed they do! My Magnaflows are 20 years old now and I can testify that they do get louder over time. Around town its no big deal but out on the highway it gets pretty loud inside the car. I can still enjoy the sound system but I do have to turn it up! My car is a 1969 Plymouth road runner, 383 4-speed with upgraded cam, rockers, ported heads and Comp XE275-HL10 cam with tti 1-7/8" headers and tti 3" exhaust system with Magnaflow 3" stainless steel mufflers. I have been toying with replacing the mufflers with something quieter but have not yet found a solution.

MagnaFlow all day. Just put one on my 2019 Silverado a month ago. Couldn’t be happier with the sound. Not obnoxiously loud, almost silent at idle/cruise speeds. Super mellow tone under normal acceleration, and sounds solid under pedal to the floor acceleration. Perfect for me

Too loud? Maybe for your neighborhood but sounds great to me.

Sounds alot better now

I got the 4”x9”x14” one. It’s really quiet at first with a stock 5.3. Might update this later but I’m loving the way it sounds. It builds revs quicker and the engine sounds like it had a huge sigh of relief compared to the stock muffler

Is louder but still good, on my Yukon Denali I install it 3 years ago and sounds better now, but still quiet on highway. Yours still sounds really good

Thanks for the vid.....made up my mind, going with the Magnaflow!!!!

It’s like a whole different exhaust system, I’m about to install a dual in Dual out MagnaFlow and I wasn’t 100% convinced yet, but now I’m doing it lol!

How many miles did you put on until it got this loud? Or did it take about a year to get louder? Sounds awesome

Big difference. I prefer the muffled quieter sound. What are the dimensions on that muffler you used?

I think that flowmasters sound better than magnaflow, not saying that I don’t like the magnafow sound, I just love the original 40 series Flowmaster

Sounds great to me one year later! 🤪

Just had a magnaflow put on my Tacoma the thing is so quite!! Like so quite really hope it gets loud

Sounds really good! I’ve had a Carven for about a year now but I recently added headers, deleted the cats and added an x-pipe and I’m not really digging the way the exhaust sounds now. Looking for something new and this definitely caught my attention lol

Which mufflers did you use. Part number? Thanks

That thing rolls out I'm gonna have to see what all you did other then the obvious exhaust and cam

Great looking and sounding truck

Would you please share you exhaust setup from manifolds back OMG best sounding 5.3 I have ever heard my tahoe needs that in its life!

Thats a differents in tone! But i wonder how u have that old school idle on it! I like it alot! Is it with stock cats or...?

Dang thats a ton louder! Jeesh

Use a borla pro xs. Resonator delete aswell on my turbo wagon. 8 months later I now get pops and crackles with a higher note . They do get louder and are best when broken in

# 19430 magnaflow cat back. Love it

Wow what a difference

My 6month old 11” Magnaflow is really starting to open up - maybe not this much - suffice to say I’m looking forward to 1yr on! 😂

I have a magnaflow 12255 on my 1999 jeep Cherokee sport with an exhaust tip with resonator sound good cant wait to here it after a year

It sounds a lot better a year after. 👍🏼. What muffler did u use? Single exit or dual. ? If you can share the info please.

Is it my imagination, or is the magnaflow louder than the flowmaster was? Now. Because it was quieter b4. And it's got a way better sound than the fm in my opinion.

I’m sold Magna Flow it is!! Awesome Vid!!

Thank you ... well done. Video says it all. Sounds great.

3:02 WOW!

So you bought this Muffler stand alone right? Did you just buy and install your 3" Pipe from your Y-Pipe to the muffler yourself? Im looking at doing it this way rather than buying a complete cat back system kit from Magnaflow. You have it dumped right before rear wheel right?

That chop sounds wicked . What grind is that .

How long will it take for the magnaflow to get louder. I just installed it almost 2 weeks ago and I already hear a slight difference. Do they really get that loud if you don’t have a cam?Anything you can do to speed up the process? Great exhaust set up by the way.

Do you get drone in the cab? I have a 07 classic with the 5.3 and a 212/218 cam and just did long tube headers cat delete on it and have flowmaster 44 on it and now wanting to do magnaflow. Truck sounds great! What magnaflow muffler is that one?

Interesting. I did a single magnaflow and left resonator on. Tried just the resonator with no muffler and it was a little bit farty sounding like a cherry bomb and droned even with v4 disabled. Also didn’t feel as torquey (although butt dynos aren’t accurate). Might give it a few more months to see how it changes.

Are u still running the cats on ur truck?

@JV Garage what Magnaflow muffler did you go with on this Chevy??? I’m really interested in buying one for my 2015 Chevy Silverado Z71

Which Magnaflow muffler did you put on your Truck. Is it a full dual exhaust. 2 mufflers or a single muffler dual pipes. I've got a Ford 468 that's built up and was curious if 2 mufflers would be better than the factory 2 into 1 exit.

Amen te this vid! You nailed it 🤙🏁🙏 I was "gifted" an upgraded exhaust system for a bday wish several years back and was unsure which one I had been given... 🤔 After a slightly rough day in the bush 😯 I have been rockin along with nothin from the cat back for 3 years 🤙🤩 - sparing further deets - recently, a well meaning mechanic "repaired" my exhaust among other matters.... I had planned on rebuilding the dual exhaust and ? Muffler, but I didn't have the heart to tell him it actually upset me to have it sound like my dads Honda civic. 😮 I don't want to drive it anywhere till it gets it's 🏀⚽️ back - ha!🤩 As SOON as I heard that Magnaflow I KNEW it was what my 04 GMC step sd ext cab had sounded like... AND YES they DEF improve with time, peeps... either way, let er rip ~ it's def a personal matter. 🤙🏁 Thanks for taking the time to do such a close comparison and sharing. 🙏🤙 🏁

I live in Dallas, how are y'all getting around the emissions test with no cats? I sure would have mine removed if I could get around that

Did the drone increase at all after 1 year ?? ... Truck sounds amazing btw !

What cams did you put in it? They compliment the magna flow pretty well

Sounds good af 😎

Whats the part number? One I'm looking at has stainless Steel Packing. Is this fiberglass?

Like a fine wine... gets better with age

So I just put one on my Volkswagen Jetta tdi turbo diesel and it’s kind quiet, but how long do you think it will take to get it going

thinking of putting a magnaflow muffler on mine hoping it sounds something like this.

I just bought a 2001 ls silverado and to my surprise it had this on it

I just put Magnas on my tundra and I'm like these are to quiet, looking forward to mine sounding like your one year video, How long would you say the actual break in was?

It sounds good before an after .

Brother that sounds even better a year later way meaner

Is it cammed or is it all the way stock🤔

I have a Cammed 6.0 Silverado 2500 with a magnaflow. I’ve only had it on a month. It’s actually very loud and the drone is so horrible I don’t want to hardly drive it. lol just wondering if you had drone or if you did anything to fix it? Thanks

Oh shit now I know why it sounds so familiar after a years worth of miles on the magna's they now sound identical to brand new loud mouth 2 mufflers check them out and loud mouth 2s keep that sound years on end!!!

​ @JohnVesely did you find any muffler that is quieter and it can last? the something happened to me on my 98 Wrangler with MagnaFlow

Did you do any other mods? Sounds way different?

No way that Cam is stock. What else has been done?Forgive me if you have answered this in prior videos. This is the first of your videos I’ve seen. Sounds like a BTR stage 2 cam or something comparable. Either way it sounds good.

I got a magnaflow on my 5.3 but still sounds nothing near as good as that. Sounds badass

Just got a magnaflow hopefully it sounds good too

can't believe - I have a MagnaFlow installed on my XJ 4.0 for a couple of years now and there's nothing comparable to the sound of the MF on your truck over time - mine sounds nearly the same as in the beginning - don't know what happened to your truck - however I'd appreciate your sound !

I can’t wait til mine get louder

That's sounds really good

Sounds great 👍

What do you got on there for an engine. Sounds nice👍🏻👍🏻

Sounds great 🤙

Cam is chopin!

Love the sound... Sounded like it got more aggressive.. 👍

Damn... I just bought one hoping it would be quieter than the Chambered FM but it doesn't seem it is.

I have a full cat back MagnaFlow exhaust on my 06 Gto. Could i swap the MF muffler on the right for a Flow master? Will my exhaust sound weird?

Official Merch: jvgarage.com/

Should try a blackwidow venom 250! No packing to burn out. Still sounds good though!👍

Does it resonate a lot between 2-3k? Cause that’s the problem I’m having with my exhaust right now and it’s really starting to drive me nuts

What magnaflow is on your truck?

What's the Magnaflow part number that you installed on this?

Sound like a muffler delete 1 year later. I'm have a muffler delete and was considering a magnaflow, but that's not going to happen after watching this video.

You're cinnamon toast crunch evolved into a mustang!

Do you have the tail pipe dumped at the axle?

Do you have cams in it?

any drone soundI?

Damn that thing sounds great. Sounds like my corsa sports on my gto

Think it would be nice on a 6.2 ext Escalade?

You got a cam in that motor?

is that a 5.3L V8?

Fuckin YESSIReeee that sounds fuckin mint

What one did you throw on?

How many miles did you put ?

What size are your wheels I’m thinking if I should get them and where you get the wheels from a good price not expensive

Does it depend on what kind of engine you have?

What model magnaflow is that?

Sounds badass to me

What exact muffler did you use?

The only reason for your muffler to become louder over time is the breakdown of the packing material inside. Therefore the muffler is actually failing and should be returned under warranty if possible. Thanks for the video, T doubt I;ll be buying Magnaflow.

how did you tint your tailights

Mannn that shit sounds baeutiful!!!!