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What should I expect from this exhaust combo?

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3.7K views 15 replies 8 participants last post by  tdjacw  
#1 ·
I had my mufflers deleted today and kept the resonators. It deepened the sound and has no drone. I'm thinking about installing Magnaflow's axle back system 16893. That effectively would mean that my mufflers would be gone and my resonators would be replaced with Magnaflow's with quad tips.

What should I expect? I'm thinking it would be a little freer flowing, and slightly less weight than the factory resonators. I also expect it to be slightly louder, but not necessarily drone inducing. Thoughts?

Also, I am considering replacing the H pipe with an X pipe. Pros? Cons?

I would appreciate any thoughts on this combo.

At some date in the distant future, I may add JBA shorty headers.
 
#4 ·
I think you could expect it to sound louder and deeper, but I am pretty certain
you will have some drone. How much, can't say.
Why do you think it will drone? The main difference between the magnaflow axle back and the magnaflow cat back is the location of the muffler. The axle back kit puts the muffler at the resonator location; whereas, the cat back kit puts the mufflers at the factory muffler location and deletes the resonators. Do you think the axle back system will drone more??
 
#5 ·
Why do you think it will drone? The main difference between the magnaflow axle back and the magnaflow cat back is the location of the muffler. The axle back kit puts the muffler at the resonator location; whereas, the cat back kit puts the mufflers at the factory muffler location and deletes the resonators. Do you think the axle back system will drone more??
The resonators are tuned specifially for our cars to tune out the frequencies that
cause the drone. The stock resonators do give you a little higher pitch. Another
member had our setup and switched the resonators out with Borla. He said it
sounded deeper, but now he has drone. Can't say for sure how much it will
drone, evey muffler is different. Just make sure to keep your stock resonators
if you don't like it.
 
#8 ·
The resonators are tuned specifially for our cars to tune out the frequencies that cause the drone.
That's exactly what I was going to say. If the system doesn't resonate ("drone"), you can probably thank the resonators; if you remove them, don't be surprised to hear some drone.

In my case (resonators replaced with straight pipes, stock mufflers left intact), it resonates at 1000 and especially 2000 RPM (and probably 3K & 4K, too). How much the stock mufflers vs. the pipes contribute to that, if at all, I have no idea. I may decide to find out by swapping the stock mufflers with something else before reinstalling the resonators. But as of now, I do expect to be putting the resonators back on at some point, regardless of the mufflers.
 
#10 ·
That's just it ... I left my resonators on and I still have some drone without mufflers. It only happens at certain rpms when decelerating, but it is annoying when it hits.
Okay. But, at the beginning, you said "I had my mufflers deleted today and kept the resonators. It deepened the sound and has no drone."

Maybe the mufflers do affect the system's resonant frequency.
 
#11 ·
Okay. But, at the beginning, you said "I had my mufflers deleted today and kept the resonators. It deepened the sound and has no drone."

Maybe the mufflers do affect the system's resonant frequency.
Well ... it was true, when I typed it. I had the mufflers deleted in the morning. As soon as it was installed, I drove it to the office (running it through the gears) and at different rpms and it was great. I was giddy (and frankly thought I was done with exhaust mods). Then, on the way home (in bumper to bumper traffic) I found myself downshifting alot and on and off the throttle easing through traffic. THAT is when the drone hit. It doesn't hit under throttle, it doesn't hit under load, it doesn't hit when cruising. It just hits at a narrow rpm band when decelerating (it sounds like you are in a bass drum). Very frustrating.

Looking at a Flowmaster Force II system now.
 
#12 ·
I deleted both my mufflers and resonators on my R/T Auto and replaced them with Summit Turbo sytle mufflers. Drone is almost gone, the radio at normal listening levels will drown it out so will riding with the windows down at highway speeds. The only thing I dont like is the exhaust now sounds badass at idle and low speeds but get up to cruising speed it is quiter than the stock exhaust, even at WOT under load it is not as boistrous as it used to be. I am thinking of going with Flowmasters in the near future.
 
#13 ·
I deleted both my mufflers and resonators on my R/T Auto and replaced them with Summit Turbo sytle mufflers. Drone is almost gone, the radio at normal listening levels will drown it out so will riding with the windows down at highway speeds. The only thing I dont like is the exhaust now sounds badass at idle and low speeds but get up to cruising speed it is quiter than the stock exhaust, even at WOT under load it is not as boistrous as it used to be. I am thinking of going with Flowmasters in the near future.
The part I bolded makes it sound pretty good to me. :smileup:
 
#14 ·
Well ... it was true, when I typed it. I had the mufflers deleted in the morning. As soon as it was installed, I drove it to the office (running it through the gears) and at different rpms and it was great. I was giddy (and frankly thought I was done with exhaust mods). Then, on the way home (in bumper to bumper traffic) I found myself downshifting alot and on and off the throttle easing through traffic. THAT is when the drone hit. It doesn't hit under throttle, it doesn't hit under load, it doesn't hit when cruising. It just hits at a narrow rpm band when decelerating (it sounds like you are in a bass drum). Very frustrating.

Looking at a Flowmaster Force II system now.
That's really strange, cars usually only drone under load. These are the type
of issues that make changing the exhaust so frustrating.
 
#15 ·
Six speeds should not experience as much drone as the autos, but there will still be some drone.

I have Flo Pro mufflers which are straight through, no baffles, 3 inch pipes and no resonators. I have minimal drone between 1800 and 2000 RPM, none to speak of at higher RPM ranges. Drone can be bad but it is also pretty easy to shift out of the rpm ranges where it occurs.
 
#16 ·
Six speeds should not experience as much drone as the autos, but there will still be some drone.

I have Flo Pro mufflers which are straight through, no baffles, 3 inch pipes and no resonators. I have minimal drone between 1800 and 2000 RPM, none to speak of at higher RPM ranges. Drone can be bad but it is also pretty easy to shift out of the rpm ranges where it occurs.

Actually if you shut the MDS off on the Auto's you will have less drone due to the smaller diameter exhaust. That's why they run a smaller diameter on the Auto's due to the MDS. I have the MDS turned off with the Trinity. I have zero drone at
any speed.