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Magnaflow 12259 - 18" Muffler

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Old 04-02-2014, 02:14 PM   #1
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Default Magnaflow 12259 - 18" Muffler

Any 5.0 owners with this muffler? Trying to quiet mine down a bit. I'm currently running a dynatech splitflow (14" length) which has a great sound to it around town but its a bit much for hwy IMO. It may have something to do with my exit being dumped over the axle into a 5" tip though.

If you have this muffler, how is your exit setup? Any sound clips? Drone?
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Old 04-02-2014, 02:46 PM   #2
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i dont and cant spec. answer ur question but i have a 16" borla XR1 and shes a lil on the loud side. I plan to add an MBRP 26" 3" O/D resiantor in front of it to replace the stock one. (i have all 3" pipe w/ 2.5 res welded back in) it help help a bit to mellow it out
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Old 04-02-2014, 03:46 PM   #3
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well its between the 12259 (18" long) bc a local guy is selling one for $50 or get the 12279 (24" long) new. Really looking to go back stock or damn near close and i think the 24" is what im looking for.
[MENTION=63832]QCFX2[/MENTION] i saw you had the 12279 at one point, any insight?
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Old 04-02-2014, 04:17 PM   #4
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The 24" is the one you will be happy with. It has a nice rumble without being overly loud at WOT and has minimal drone at 1800-2000rpm.

A guy I work with went to get the 24" put on his Chevy 5.3 like I had on my Ford 5.0. They put the 18" on and he complained about how much more drone he had compared mine. He measure the muffler and it was the 18". He went back and the put the 24" on like he asked for the first time and it took care of the overly loud drone problem.

This is how the 24" sounds in my regular cab 5.0 with the windows up:
http://chuckmassey.com/lightningpage...hiftpoints.wmv

Here is what mine looks like mounted to the stock tailpipe with 3" pipe added to the front:

Click the image to open in full size.

Click the image to open in full size.

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Old 04-02-2014, 07:01 PM   #5
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I looked it up and the muffler that I have in the pics above is a 12589. It is 22" long oval 3" inlet/outlet center and side offset.

The 12279 is a 24" long oval 3" inlet/outlet center/center offset. That should fit fine.
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Old 04-02-2014, 08:39 PM   #6
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Quote:
Originally Posted by LTNBOLT View Post
I looked it up and the muffler that I have in the pics above is a 12589. It is 22" long oval 3" inlet/outlet center and side offset.

The 12279 is a 24" long oval 3" inlet/outlet center/center offset. That should fit fine.
The 12279 is the one I had put in where my stock muffler was and it was great.... But do whatever lol
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Old 04-03-2014, 02:01 PM   #7
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i just put my 18 inch maggy on, i believe 12228, its a 3 inch si and 2.5 in do. had no muffler before and man this thing is quiet and sounds great when i get on it
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Old 04-07-2014, 09:09 AM   #8
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Quote:
Originally Posted by zimmer0 View Post
well its between the 12259 (18" long) bc a local guy is selling one for $50 or get the 12279 (24" long) new. Really looking to go back stock or damn near close and i think the 24" is what im looking for.
@QCFX2 i saw you had the 12279 at one point, any insight?
Maybe it is me getting older or whatever but I hated the magnaflow.

I actually really prefer the stock muffler and like hearing the engine work. My 2010 has the 4.6 3v and these did not come with resonators so I actually trashed the magna and went with a full raptor exhaust.

Then I found it had a drone to it as well so a local friend/member and I swapped his full stock with my Raptor. Much better
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Old 04-08-2014, 12:55 PM   #9
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If someone has a 12279 Magnaflow lying around let me know. I'd be interested
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