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MagnaFlow Muffler Swap and Resonator Delete

Messages
29
Reactions
24
Location
Litchfield Park, AZ, USA
#1
I couldn’t bear the thought of shelling out $1200 for shiny pipe, so I had a local shop help me out. They swapped the stock muffler for a comparable sized dual-in/dual-out MagnaFlow. Then they ripped out the resonators and added some matte black Y-tips. It has a deeper tone at idle and really opens up under acceleration! It has a small drone at random speeds in sport mode, when other modes would have swapped gears at speed/rpm. Above 80 the drone kicks in again, even in 10th...
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808st

New Member
Messages
10
Reactions
6
Location
Honolulu, HI, USA
#2
Very nice! I just removed the resonators yesterday, but left the oem muffler. It sounds similar. I was debating swapping out the muffler as well. I’ll live with the oem muffler for a little while and if I want more sound, will do the muffler swap. Do you have the oem muffler still? If so, I am curious as to if it’s a straight through design or what It looks like inside. Any insight will help. Thanks for the comparison. Nice color ST btw.
 
Messages
29
Reactions
24
Location
Litchfield Park, AZ, USA
#4
Thanks!

The OEM muffler is a straight through design, but it looks to have a weird bit of baffling and ridges for air to get caught up and bounced around. They are also slightly different from side to side, and I’m not sure which way it was mounted in the vehicle. Also, taking a picture through a dark tube during the day probably didn’t help...

I think the dual-wall tips are 3”, but I can measure tomorrow morning. I dint want to wake anyone up by turning on and off the alarm at 1am.

To be honest, it didn’t make a ton of volume with just the muffler swapped, before deleting the resonators. However the tone was definitely more deep/rich. I’ve only used Flowmaster and aFe on other vehicles before this, so I was pleasantly surprised that it has tone, without a ton more volume. It gets a bit louder when you give it the beans. That’s all I really wanted. I’ve only had the the ST for a few weeks, but was already tired of it being compared to a Dyson or a Hoover by buddies...

I’m also not taking her out to any track days, but the weight reduction of 20-30 pounds was another benefit.

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Messages
121
Reactions
77
Location
Columbus, OH, USA
#5
I'd say the tips are 3.5 or 4 inch....the factory pea shooters are 3 inch lol.

Only reason I ask is I'm having different tips put on tommorow and I have two sets sitting here, 3.5 and 4 inch and I'm torn lol.
 

808st

New Member
Messages
10
Reactions
6
Location
Honolulu, HI, USA
#6
Thanks for the details on the oem muffler. I’m very happy I removed the resonators. It is 10x more enjoyable driving the vehicle now. Still debating, but a replacement borla or magnaflow may be an option on the future.
 
Messages
171
Reactions
68
Location
Secaucus, NJ, USA
#7
you guys are brave.. i still have my stock exhaust intact.. you never know.. but after having a 3” straight pipe, i doubt i’ll ever go back to stock.. just waiting for some catless downpipes to appear on the market. :whistle:
 
Messages
27
Reactions
7
Location
Richmond, VA, USA
#8
you guys are brave.. i still have my stock exhaust intact.. you never know.. but after having a 3” straight pipe, i doubt i’ll ever go back to stock.. just waiting for some catless downpipes to appear on the market. :whistle:
Ha, now we are aligned.
 
Messages
36
Reactions
19
Location
Punta Gorda, FL, USA
#9
Thanks!

The OEM muffler is a straight through design, but it looks to have a weird bit of baffling and ridges for air to get caught up and bounced around. They are also slightly different from side to side, and I’m not sure which way it was mounted in the vehicle. Also, taking a picture through a dark tube during the day probably didn’t help...

I think the dual-wall tips are 3”, but I can measure tomorrow morning. I dint want to wake anyone up by turning on and off the alarm at 1am.

To be honest, it didn’t make a ton of volume with just the muffler swapped, before deleting the resonators. However the tone was definitely more deep/rich. I’ve only used Flowmaster and aFe before this, so I was pleasantly surprised that it has tone, without a ton more volume (until you give it the beans). That’s all I really wanted. I’ve only had the the ST for a few weeks, but was already tired of it being compared to a Dyson or a Hoover by buddies...

I’m also not taking her out to any track days, but the weight reduction of 20-30 pounds was another benefit.

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So are you saying you replaced just the muffler first and it did give you a little more sound. Then you replaced the resonators with the strait pipes? Sorry but kinda lost. Lol. Thanks!
 
Messages
29
Reactions
24
Location
Litchfield Park, AZ, USA
#10
So are you saying you replaced just the muffler first and it did give you a little more sound. Then you replaced the resonators with the strait pipes? Sorry but kinda lost. Lol. Thanks!
The guys working on the ST happened to start with the muffler. I asked them if I could start it up with just the muffler swap. They obliged. I just popped the remote start, and didn’t get a chance to rip it, because it was still on the rack, in the air. It had about the same volume but a slightly deeper tone.
 
Messages
29
Reactions
24
Location
Litchfield Park, AZ, USA
#11
I'd say the tips are 3.5 or 4 inch....the factory pea shooters are 3 inch lol.

Only reason I ask is I'm having different tips put on tommorow and I have two sets sitting here, 3.5 and 4 inch and I'm torn lol.
3.5”

Forgot to mention that the tips stick out an even amount, and I had the inboard tip even vertically with the bumper. It makes the outboard tip stick out just enough...

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Messages
30
Reactions
8
Location
Kelowna, BC, Canada
#12
I saw the price of the Borla system and shook my head, glad there are others that have tried some different ideas rather than shelling out that kind of money for what looks like a fairly routine exhaust system.
 
Messages
38
Reactions
23
Location
The midwest
#13
Thinking of leaving the mufflers in place and either replacing the resonator with an X-pipe or using the Dynomax Ultra-Flow muffler (which may not fit in to the stock location due to the offset of the OE resonator). Either way, should wake up the sound just a hair, but keep it in line with what Ford used on the previous generation Sport model. That one had a very pleasant rumble.

DynoMax UltraFlow.jpg
 
Messages
29
Reactions
24
Location
Litchfield Park, AZ, USA
#14
Thinking of leaving the mufflers in place and either replacing the resonator with an X-pipe or using the Dynomax Ultra-Flow muffler (which may not fit in to the stock location due to the offset of the OE resonator). Either way, should wake up the sound just a hair, but keep it in line with what Ford used on the previous generation Sport model. That one had a very pleasant rumble.

View attachment 813
The OEM muffler is a straight through design. You may hear a small difference in tone, but you will not hear a difference in volume by solely replacing the muffler. Your volume will come from removing the twin resonators. I think if you want noise, without the drone of straight-pipes, a quality dual-in/dual-out and resonator delete is where it’s at. You’ll add tone and volume, and get rid of the fake tips...
 
Messages
38
Reactions
23
Location
The midwest
#15
You're getting terminology all mixed around here: the forward "muffler" is the resonator, the other two at the tail pipes are the mufflers. The resonator itself is there to change the sound in whatever way the engineers tune it. Even being "straight through", all the perforations in the tubing will deflect the exhaust waves through the inside of the casing before it flows out to the mufflers. I'm sure that removing it and replacing with an actual 'X' or the DynoMax version (if one fits) will definitely make a difference. Whether or not I want to be the one that experiments with it is a different story since I'm hoping Magnaflow will come out with a system that sounds better than Borla.

ST exhaust components.jpg
 


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