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View Full Version : Magnaflow or Flowmaster?



Intrepid Bass
05-15-2008, 11:16 PM
Getting an exhaust for my avalanche soon and wanted some opinions on each. I was told the only difference is sound. Any input?

brtnboarder3241
05-15-2008, 11:17 PM
no

Keith H
05-15-2008, 11:17 PM
Straight pipe.

Chevyboy10
05-15-2008, 11:18 PM
Straight pipes trust me its deep on them i have tahoe its awsome ...not redneck

coledawg
05-15-2008, 11:18 PM
i heard more positives about the flows...

tez4life
05-15-2008, 11:18 PM
Im more to Flowmaster, but both make good exhaust.

97gp
05-15-2008, 11:18 PM
Straight pipe.

Fo sho

lil_italy773
05-15-2008, 11:22 PM
flowmaster is more a louder exhuast and the magnaflow is a softer sounding exhuast my step dad tryed both. going with magaflow first and wasnt what he wanted. so he tryed flowmaster and night and day differace. this is on 5.7L hemi so it wasnt a power issue 380HP/404LBS torq

Calikid
05-15-2008, 11:22 PM
I'll stick with flowmaster, what model are u planning on purchasing?? and any system in the avy yet?

82 cutlass
05-15-2008, 11:34 PM
Magnaflows flow better and are alittle less noisey and are stainless . A 40 series flowmaster on that will sound awesome . Catback...the flowmaster systems sound better but the magnaflows will get you just a little more power . Solos are better than both . It all depends on how far you want to go in the exhaust...headers...high flow cats...bigger pipes to acheive your goal

alxmlr789
05-15-2008, 11:35 PM
Flowmaster will be ALOT louder inside. alot.

They drone like crazy, one of the reasons i took it off. I actually just ordered a magnaflow 2 minutes ago.. lol

Alpine CDA-9815
05-17-2008, 12:11 AM
Flowmaster has always been and will always be crap. Magnaflows will flow better, hands down. Magnaflow is quieter around idle and cruising speeds but it gets loud once you go WOT. I had Flowmasters befor and I'll NEVER get them again, Magnaflow or Bassani FTW.

dbhittin
05-17-2008, 12:13 AM
flopro is awsome.. what my dad has on his truck. i have magnaflow. dont like flowmaster

jfsh90
05-17-2008, 12:16 AM
Borla

Supergumby5000
05-17-2008, 12:18 AM
both companies patent contracts are up

go to a local shop and i guarentee you they have an exhaust system that replicates at least one of them, and its at a fraction of the cost.

I have the GM performance exhaust/intake on my truck. Its not roaring loud, but sounds good and gets throaty when you romp on it.

However, i would probably go a gibson dual sport exhaust if i were to switch it up, but i got a 75% discount on the GM parts :crap:

Supergumby5000
05-17-2008, 12:18 AM
Borla

this man speaks wisdom

although borla is **** spendy

Alpine CDA-9815
05-17-2008, 12:22 AM
Borla
XR-1's :)

Injected54
05-18-2008, 06:24 PM
I'd go with the Magnaflow over the flowmaster.

Magnaflow>Flowmaster

DejaWiz
06-05-2008, 10:34 PM
What did you end up getting, Intrepid?

If you're still looking, check out the new Cherry Bomb Vortex (http://www.cherrybomb.com/products/vortex). PerformancePeddler.com has them for around $75-80 shipped if you call to place your order. Some good sound clips on youtube.

eharri3
06-06-2008, 09:36 AM
Magnaflow. Flowmaster has a chambered design to make its trademark, uneven, 'lumpy' old school sound some people like in an exhaust. Magnaflow's straight-through design is more efficient and the stainless steel will probably still be fine when the rest of the car falls apart.

Although I have to tell you... I took a chance on a 13 inch SI/DO dynomax superturbo for my 04 Dakota 4.7 and it is a VERY mean, deep sounding muffler that can be had on the cheap and sounds awesome from inside AND out.

Straight pipes will be loud but if it isn't done right you'll loose torque from inefficient exhaust scavenging.

FAM4LIFE
06-06-2008, 09:47 AM
Flowmaster has always been and will always be crap. Magnaflows will flow better, hands down. Magnaflow is quieter around idle and cruising speeds but it gets loud once you go WOT. I had Flowmasters befor and I'll NEVER get them again, Magnaflow or Bassani FTW.


Funny. My 40-series on my truck aren't even noticeable at idle or cruising speeds. I only notice it when I get on the gas. I got duals straight back. Although I am considering something different.

Towncar
06-07-2008, 05:19 AM
Flowmasters sound great.. I have them on my car, but they will be getting removed shortly. They rob power, especially on a heavily modded car. Here is a vid of how my car sounds
though.. Im pretty happy with the sound. If you want the sound, then get the 40 series..

http://i210.photobucket.com/albums/bb199/mycrownvic01/th_MOV00841.jpg (http://s210.photobucket.com/albums/bb199/mycrownvic01/?action=view&current=MOV00841.flv)

Lil Poot
06-07-2008, 05:25 AM
magnaflow. i also had a hooker catback on my trans am before going to the spintech true duals, and it sounded really healthy.

95ZJ
06-07-2008, 05:26 AM
Dr. Gas or Spintech if you can afford it/find it.

Psycareyo
06-07-2008, 02:33 PM
I had a FLowmaster 50 SUV on my new truck and it sounded crackly and the HP rating wasn't very good. The cab noise was annoying. It's good for a 16-18 year old kid who just wants people to look at him. I think the cab noise was a direct result of the baffle placement. Magnaflow uses a straight through design. Nothing is better than straight through for performance. If you're a poser then pick Flowmaster instead imo. If you want a cheaper muffler that sounds exactly the same if not better...try a Cherry Bomb Vortex as mentioned by a previous poster. I had one in my last truck and it sounded excellent.

I just put on a Magnaflow 5x8x14 oval offset/offset 2.5/2.5 and it's much better. The cab is noise is low so I feel I can hear my audio system better. The sound is excellent. When pick up from about 3000 rpms it really thunders to life. The HP gain was nearly double at 10hp-11hp gain. I added a K&N air charger and picked up another9-10hp. Topped it off with a SCT x3 custom tune for a net gain of about 19hp and 2.3mpg. Dyno tested best of 331hp over stock 292hp. I could have been a little more crazy on the tune but I didn't want to lose anymore mpg.

Go with Magnaflow imo.

Whatever you decide performancepeddler.com is the best place to buy. They have the most insanely low pricing w/ free shipping. Their customer service is exceptional. I bought everything from them except my SCT xcal3.

GearGuy2001
06-08-2008, 10:01 PM
I have magnaflow's on my car, this video was taken when they were new so its a bit louder now but that gives you an idea. I was going to get flowmaster but they are more expensive, not stainless, and not straight through like magnaflow

Stainless is a big plus in harsh IL winters

http://img.photobucket.com/albums/v157/GearGuy2001/97GrandMarquis/th_DSCN1264.jpg (http://smg.photobucket.com/albums/v157/GearGuy2001/97GrandMarquis/?action=view&current=DSCN1264.flv)

dvrmstrng
06-08-2008, 10:06 PM
borla x10

Psycareyo
06-09-2008, 11:39 AM
Borla is nice. To expensive imo. You pay for the name more than the product value imo.

Buck
06-09-2008, 11:49 AM
mufflers r weak.....always go straight pipes

donpisto
06-09-2008, 12:40 PM
Borla

What I was going to suggest....along with with Corsa


Borla is nice. To expensive imo. You pay for the name more than the product value imo.

You get what you pay for IMO. I've heard Magnaflow and Borla on a 90 vette, Borla>>>>>>>Magnaflow. If you shop around, you can find them cheaper on eBay or certain online stores.

Psycareyo
06-09-2008, 12:49 PM
Doesn't Borla use baffles to create the sound? My Magnaflow doesn't. It's also straight through, stainless and way cheaper.

I guess it depends on application. the 4.6L Ford engine sounds awesome with just abuot anything. I didn't really like the Flowmaster 50. I've had a mustang gt with the SLP loudmouth and it sounded really good. I've had a 69 Firebird 400 with dual Flowmasters and It sounded great. Thats the reason I bought it for my new truck but I wasn't satisfied. Hense the Magnaflow. So far I like it a lot better.

duece212
06-09-2008, 12:52 PM
I have the 18" magnaflow, 3" in, 3" out on my 4.6l f150 with just regular crush bent 3" pipe from the local muffler shop. Sounds great, unfortunately it flowed so much better than stock that I lost a little bottom end :(

ABSOLUTEAUDIO
06-09-2008, 02:16 PM
Go with flowmaster! Have them on both mustangs. A nissan titan, and camaro. Have ran magnaflow on titan but it **** out after 1 winter :mad: Plus got better gas milage with flowmasters:)

Psycareyo
06-09-2008, 04:18 PM
I have the 18" magnaflow, 3" in, 3" out on my 4.6l f150 with just regular crush bent 3" pipe from the local muffler shop. Sounds great, unfortunately it flowed so much better than stock that I lost a little bottom end :(

Sounds like a classic case of back pressure reduction overkill. You probably lost a healthy chunk of torque. I was worried about this but mine seemed fine with the Flowmaster and it's a little snappier with the Magnaflow but it really isn't that much different I suppose. I like the sound better though.

mepratt1234@cha
06-09-2008, 04:55 PM
I like my Cherry Bomb. It was a lot less money than the others.

If price isn't a factor then I would probably do Flowmasters.

Lingerfelt
06-09-2008, 04:57 PM
I like my Cherry Bomb. It was a lot less money than the others.


:laugh:

duece212
06-09-2008, 04:58 PM
Sounds like a classic case of back pressure reduction overkill. You probably lost a healthy chunk of torque. I was worried about this but mine seemed fine with the Flowmaster and it's a little snappier with the Magnaflow but it really isn't that much different I suppose. I like the sound better though.

Yup, the crush bent exhaust pipe I thought would keep me some back pressure but it is indeed overkill. Oh well, its not a horrible loss down low, but a person does have to be careful to not overdo it on exhaust or you can lose alot of power down low.

Buck
06-09-2008, 04:59 PM
Doesn't Borla use baffles to create the sound? My Magnaflow doesn't. It's also straight through, stainless and way cheaper.

I guess it depends on application. the 4.6L Ford engine sounds awesome with just abuot anything. I didn't really like the Flowmaster 50. I've had a mustang gt with the SLP loudmouth and it sounded really good. I've had a 69 Firebird 400 with dual Flowmasters and It sounded great. Thats the reason I bought it for my new truck but I wasn't satisfied. Hense the Magnaflow. So far I like it a lot better.

i gota 4.6 in my f150 took the muffler off dual out 2.5 pipe and its sounds good and its low. bout to take 2 cats off.......

brmcm15
06-09-2008, 05:05 PM
magnaflow

Psycareyo
06-12-2008, 04:40 PM
Yeah the magnaflow is a low tone. It takes a few thousand miles for them to sound the way they do in their sound/vid clips on their website.

My flowmaster 50 was louder for sure. Problem was that it sounded all exhaust. I believe that the vehicle needs to sound like it's got real power. Not just sound. The Magnaflow with a cone type intake really sounds awesome together.

Gotta keep that cab noise down imo. Drives me insane. That was one of the reasons I didn't like the flowmasters.

FineLinePimpin
06-24-2008, 03:14 PM
Gotta hate the Flowmaster death drone on the highway.