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Discussion Starter · #1 ·
Ok, Im look at the Magnaflow mufflers, but there are so many. They got the oval, round, offset, offset, center, center, center offset. You go on auto anything and they have 6x14, but every where esle is 5x9. My question is, which one is the right muffler for the I4 Fusion. Anyones help would be greatly appreciated.



http://www.autoanything.com/exhausts-mufflers/65A2692A0A0.aspx


Thanks
 

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The first thing you want to decide is what ID (inside diameter) muffler you want. Your choices are 2", 2.25" or 2.5". A larger ID muffler will be louder and flow a bit better at high rpm (you might pick up a few HP). A smaller ID is quieter and provides more low end torque. I have a 2" DynoMax and love it. I had a 2.25" Magnaflow and it was louder on the hwy (as you'd expect) but not as throaty as a 2" DynoMax. Overall the sound level for both is "quiet", only a bit louder then stock. If you want a performance sound throughout the rpm range you'll need a 2.5" muffler and a 2.5" or bigger tailpipe. As for case size, there's plenty of room under the car for muffler shop to weld in a oval muffler. What's fits very well is a: "offset/center 5x8 oval in a 14" length".

 

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The straight through Magnaflow oval fits beautifully under the Fusion. There isn't enough room for a long round Magnaflow turbo muffler (XL).

You also might want to consider the DynoMax Super Turbo muffler.
 

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http://www.magnaflow.com/02product/shopexd.asp?zone=main&id=772

i talked to magnaflow before i bought mine...they said that 4inch round is the loudest street series and 5inch round is the loudest race series....with race being the loudest over all

i have the one at the link up top it's loud but not uber loud....i plan on getting rid of my muffler and having just strait pipe... i wonder how loud that would be or if i would loss power or gain power. NO RESTRICTION RIGHT.
 

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I have the dynomax on my I4 and not only do I get better gas milage but it sounds like a BMW modified. A deep throwty growl. Remove the resonator and it sounds even better. You want high cfm go dynomax
 

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Discussion Starter · #7 ·
I went with the MagnaFlow Catback exhaust w/ resantor. Lol My wife thinks its stupid. The seal of approval. But I like it scratch that Love it. :exnbp:
 

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Update - I forgot to mention that the stock exhaust, most of which is 2.25" necks down to 2" just before the muffler (which is a 2" ID). When I had my 2.25" Magnaflow the muffler shop didn't cut off that necked down section and that acted as a sound/db killer. So a 2.25" muffler of your choice is the easy part, the tough part is choosing one. Magnaflow's price, performance and quality are certainly tough to beat.

Here is a popular chart that has made it's way around most of the V8 car and truck forums. I think it's from a test of 2.5" mufflers on a Mustang GT





The results in HP order:

1.Flowtech Warlock (open) 374.2 hp/ 333.1 tq
2.Bassani Real Street 373.7 hp/ 333.8 tq
3.Hooker Maxflow 373.5 hp/ 333 tq
4.Borla XS 373.3 hp/ 332.6 tq
5.Magnaflow 372.8 / 332.5 tq
6.MAC 372.3 hp / 331.5 tq
7.Flowtech Afterburner 372.3 hp/ 330.1 tq
8.Hooker Aerochamber 372.1 hp/ 330.4 tq
9.Bassani 372 hp/ 333.5 tq
10.Spintech 371.6 hp/ 332.2 tq
11.Edelbrock Performer RPM 370.9 hp / 331.3 tq
12.Borla XR1 370 hp/ 334 tq
13.Flowtech Terminator 369.5 hp / 331.3 tq
14.Dynomax Ultra Flo 369.4 / 333.2 tq
15.Flowmaster 369.4 hp / 331.8 tq
16.Flowtech Warlock 366.3 hp / 325.3 tq
17.No muffs 365.2 hp / 330.1 tq


Sound Off in Quietest to Loudest (Decibels):

1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.
2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.
3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.
5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.
6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.
7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.
8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.
9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.
10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).
11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.
12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.
13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.
14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.
15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.
16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db
 

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When I first did my exhaust on my 5.0 liter , I took off from the muffler shop and set off a car alarm, that's with Flowmasters and off road h-pipe. Then I knew I made the right choice. On my Fusion I have the Magnaflows that come in the cat-back set-up, less the resonator. Not super loud, but a hell of a lot better than stock. P.S. someone posted somewhere on here that Borla is coming out with a Fusion exhaust. Never had a Borla, but have heard it on lots of mustangs and they sound really healthy.
 

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Borla's are great but usually expensive. I highly doubt they'll be anywhere close to the excellent prices of the Magnaflow cat-back systems from http://completeexhaust.com

6 cyl - $499 shipped! :shock:


4cyl - $349 shipped! :shock:
 
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