Magnaflow VS. Flowmaster?
Freshman User
Joined: Mar 2009
Posts: 33
Likes: 0
I have been looking for a new exhaust system for my truck but im torn between what one i should get i have been looking at Flowmaster 40 series and a Magnaflow system (16612) and i was hoping to get some responses from people who have either one of these exhaust systems on there trucks and im kinda of hoping for less then 500, any help greatly appreciated
-Matt
-Matt
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Postmaster
Joined: Jun 2006
Posts: 2,834
Likes: 3
From: Kzoo
Whoa, resurrect a dead thread lol... Uhh I ended up getting a Magnaflow DI/DO muffler i cant remember the number and then I had a local shop install it. I have been really happy with it.
Senior User
Joined: Mar 2009
Posts: 215
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From: Culleoka TN
I have the flowmaster american thunder 40 series. I love it sounds great. I also increased noticable power and gas mileage. The thing with getting a local shop to do it instead of ordering a kit is a kit is going to come with mandrell bent tubing with no crimps in the bends which allows more flow, more power, and a better sound. It will also come with a 3 inch pipe to go from the cat to the muffler and 2.5 inch from the muffler to the tips if you have a local guy do it he will probably leave the small 2.5 before the muffler which will also cut down your flow. IMO flowmasters were made for fords, trucks and mustangs with flows they always sound great.
New User
Joined: Aug 2009
Posts: 21
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From: Douglasville, GA
I have the Magnaflow kit on my 04 with the 5.4 and it sounds great. I agree with a previous post that it has a low rpm growl and also sounds great when you get on it but at cruising speed it is just a pleasant hum not an annoying drone.
New User
Joined: Jun 2011
Posts: 2
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It looks like the consensus in the comments at the bottom of this page shows that Magnaflow is the winner vs Flowmaster, but one states that Magnaflows can sound a bit Euro http://www.autoanything.com/articles...-the-best.aspx
Junior User
Joined: Nov 2009
Posts: 68
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From: socal
Flow, I like mine but think in ready to yank it and put 2 new ones with some kinda hi-flow cats. Any recommendations ?
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Freshman User
Joined: May 2007
Posts: 45
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I can't speak for a full exhaust system but if anyone is going with just a muffler and tip for some extra sound take the Flowmaster... Mine sounds great and at interstate speeds stays quiet. A friend of mine also did just a muffler and tip setup wt the Magnaflow and it just doesn't have much sound. 
Senior User
Joined: Mar 2010
Posts: 349
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From: Columbus, GA USA
I have a Flowmaster knock-off. If I could do it over I'd do another muffler.
It doesn't drone at hiway speed, but it does at certain RPM and throttle position. The guy said he'd add a resonator for me. I will listen to myself from now on and go magnaflow.
I had a Forza-Flow on a Ram once, it was NO drone, perfect.
It doesn't drone at hiway speed, but it does at certain RPM and throttle position. The guy said he'd add a resonator for me. I will listen to myself from now on and go magnaflow.
I had a Forza-Flow on a Ram once, it was NO drone, perfect.
Senior User
Joined: May 2010
Posts: 295
Likes: 5
From: Somerset, KY
I love my Flowmasters, but I don't hate any other brand. Personally, I think that with a skilled mechanic, the right muffler, and the right tips you can get any brand to sound how you want. Going from a 2 to 3 inch tip made a very noticeable deep noise increase for me for example.