i have had a flowmaster 40 series on my 4.6 for about 8 or 9 months now and would not even consider getting a different system! I still find myself rolling down the windows in cold weather just to listen to the powerfull sound the flowmaster creates. I dont know about any power gain but any power gain you get from any muffler is going to be very small anyway, unless you get many other mods to go with it. My .02 cents, get the 40 series! You will love it and more importantly other people will love it and like me you will get many compliment on the sound!!! As for price, i got mine (single in dual out) on ebay for 45 bucks!! And yes it was brand new!!

And again... ;-))
 

bigtruck wrote:

"flowmaster is a great system and everyone who has one that i have talked to loves it, the only ones talking trash are the guys with the magnablows becouse they paid way more than i did for my flowmaster, yes i did trust mike to tune my truck and if he had a contract for selling flowmaster i am sure he would do alot of r@d on them but he doesnt so he does his r@d on the magnablows, f150tucson find one of your friends or someone you work with that has both of the exausts and ask them how they like each one, i am slightly biased because i have been using flowmaster for years and never once had a complaint, i have never used magnaflow but they seem way to pricey for me, it is your truck find something you like and good luck, and MGDfan when you find a guy that has dynoed his truck with both systems and can prove that the magnablow outperform in everyway then i will be a believer will i go and pay the price for the manaflow probably not but we will both have gained knowledge, not trying to bash magnablow but you can keep it and i will keep indorsing flowmaster it has been tried and true for me for many many years"

------ ~ -----

*Sigh*....

So, what you are basically saying is: you trust Mike to provide custom tuning for your truck, but you don't trust his R&D on exhaust systems. He has previously stated ( many times) that he has *already* extensively tested and dyno'd all the major catbacks for these trucks, and found Magnaflow to be the best in terms of performance ( retention of low-end torque and gains in HP ).

Now, I don't know about you, but Mike has never struck me as the kind of guy who would peddle anything other than the best components - stuff that he believes in and actually uses himself.

To my knowledge, he has *never* mislead anyone with his advice. He does not seel stuff that doesn't work, or stuff that he hasn't thoroughly tested. That's why his reputation is beyond reproach.

To say that he would peddle Blowmaster over Magnaflow contractually is just plain old B.S, fella. Go ask him. In a contest between his advice and yours... you Lose, boy.

Now - why don't you show us your dyno sheets to corroborate *your* belief that Blowmasters are superior? Not sound, performance. You want cheap and sound - go Green 98's route and straight-pipe it ;-)).

As for price - I got a great deal on my Maggie - it's stainless too. Approx $100 difference and simply no comparison w.r.t quality.
Looking at the mods on your truck - price can't be a major factor in any case.

I'm a relative Noob here - but folks like Max Mitchell and Neal are not. Guess what systems they believe in? By all means, don't listen to me, but you disregard their sound advice at your peril.

Max/Neal - where are you in my time of need??? Some pix are in order!

Cheers, big guy - it's Friday. And never any hard feelings...

MGDfan, this is going nowere, you got what you like i got what i like agreed? mine was $100+ cheaper my whole system cost me 170$ install welding did myself, so lets call this a draw and drink some beers agreed?

:beers:

i can show my dyno sheet with my current # but that is with all mods, bet i beat most of you guys with magnablows(i got alot done besides exaust so it is cheating):D :beers:

https://www.f150online.com/galleries...529-115143.jpg

Neal ran Flowmasters originally and replaced them with Magnaflows. I believe he mentioned the baffles rotting out. If you search Mike's posts in ascending order, you'll see that his recommendations have evolved. Also, I find it quite humorous for someone to hail one straight-through muffler as "King of them all". I haven't seen anyone here ever post a complete muffler evaluation, including dyno charts, listing which mufflers were and weren't tested. I've never recommended Flowmasters on F-150s because most are low-flowing, chambered, mild steel versions. I suggest a single exhaust system, so low flow becomes more important when you run ONE muffler. I like the original Flowmaster 40's sound and I know that they're very popular on Mustangs with duals. I've recommended a straight-through design, high-flow, stainless steel muffler the entire time I've been here. Although Magnaflow is the latest kid on the block, I've always recommended the Dynomax Ultra-flow, followed by Borla. Borla is great if you like a mild sound. Since my recommendation is never taken, I don't typically mention the brand anymore. The version I installed on my 2000 5.4 had a flow rate of 2200cfms; 6-7 times that of a Flowmaster. I like a throaty sound and it delivered. My recommendation isn't clouded by a warehouse of products to push. IMO Dynomax's parent company has a better reputation: http://www.tenneco-automotive.com/ov...financial.html As usual, there are varied opinions and members take what they want from them. Picture a cow with a nose ring....anyone comes along, hooks on it, and guides them around.

Can anybody say with authority exactly how much horsepower is being lost at low RPM's on flowmasters. How can there be so much talk of "Loss of power" when I havent seen a piece of damn paper to prove it.

I have put true dual flowmaster 40's on 2 different 4.6L's and never noticed any loss of power. One truck I noticed a considerable amount of gain at highway speed. The other truck not as much at highway speed but still an improvement. Different gearing as well so different powerband usage.

And on top of the power gains that I KNOW are there......you have a sweet sound coming from behind, that I could listen to all day long.

FLOWMASTER!!!!!!!
 

I too have a Flowmaster muffler. I you want a nice sound then you cant go wrong with them. The hp claim is just that. I dont see you getting any type of noticeable gain from a muffler. As for the chrome Magnaflow muffer, who is gonna know its chrome unless you get under the the truck to look? I sure wouldnt get under the truck to polish it and keep it shining. I'll bet most of the guys with them dont polish them either. The chrome is just a waste. The extra money can be spent on chrome tips that will be seen and compliment your truck. I have gotten compliments on the sound of my truck due to the exhaust. If nothing else, Flomaster is known for a strong powerful sound.
:rocker:

OK
 

Bigtruck: agreed - beers are on me ;-))

Max-in-the-middle-Mitchell: thanks for the great pix and the sanity check ;-))

Screwed: it's not chrome, it's Stainless Steel .. so they don't rot out or fall off for you to find in your driveway ... which is the best place for flows IMHO... ;-)). And whaddaya mean, you don't polish your undercarriage bits???? Jeezzz, doesn't everyone?

Man, I love this forum!

Cheers!

I keep hearing about the magnaflow exhaust. How does the gibson stainless steel catback system compare? I have had flowmaster and absolutely love it, but the guy that put it on put way to much weld around the seam and it rusted out, gotta love Michigan winters. So I replaced it with a Gibson system. I looked at the magnaflow system but didn't know anything about it and I wasn't a member here at that time. So where are we all going to have a few beers.:D

i'm hesitant to put on an exhaust system just for that reason....loss of low end torque! My favorite thing about the 5.4 is all that great low end! It will accually shift into 4th at low speeds, go to like 1200 rpm and accually accelerate rather than shifting down if you gas it a bit. And for blacktop cruising, it rarely downshifts. My 4.6 was constantly downshifting. Some of that may have been tranny programming.

Any one have the Super 40 on their 5.4L truck? does the super 40 outperform the 40 or is it just quieter?

Anybody tried those new flowmaster mufflers called hushpower II's. Interested to see what they are like.

FlowMaster Hushpuppies ! That's da bomb for reformed straight-pipe rednecks!

Cheers

Re: OK
 

agreed beers on you, every one has there own taste and prefrence, i was born and raised on flowmaster and i love them, if you like magnablow than that is your problem:D but i go with what has been tried and true for me i take everyones opinion in stride, now if i was to turbo or supercharge my truck i would try the magies or another straight threw deisign because backpresure would be less of and issue, maybe even zoomies man those things are loud, no hard feelings mgdfan hope your skin is as thick as mine, loved the pic max can i be the bigger bear?

I just order some parts for my custom exhaust system. Iwas running a Gibson Supertruck that I think was a good product but I am looking for more sound. So I started to consider the Flowmaster. But since we can run only one muffler at the time and after many many considerations I am going with a set of Stainless JBA's (been sitting in a corner for several months), Magnaflow Hi-Flow Cat's #94306, Magnaflow SI DO muffler #12158 all exiting in front of the rear passenger side tire with two Magnaflow 4" SS 45º slash cut tips.

I think I can get a good sound because of the combination of the headers and the hi flow cats. I will let you know as soon as all this is installed.

If this is not what I am looking for, I'll keep looking around.