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Discussion Starter #1
I'm pretty close to buying a Flowmaster and have been looking at prices. The exhaust systems seem to be the same 2.5" pipes as the stock on the Nitro. I don't see that many bends in the existing stock exhaust either. Do the mandrel bends make that much of a difference?

I guess I'm just wondering what the benefits of the entire cat-back system is vs just the muffler as far as performance is concerned.

Also, I'm not looking for a look-at-me sound, something very subtle. I'm just getting a handle on the numbering system, is it the 70 series I want for subtle?
 

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I'm thinking the same thing. I looked inside the rear resonator and it's
straight thru toso I'm thinking just swap out the muffler and be done.
Without cutouts on the rear bumper I don't think I want chrome tips
either. I think I'll pull the stock system and paint it black when I do
the muffler.
 

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Khaki Nitro Nut
07Lifted,4X4,6sp-man,3.7L
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Yeah, that was my job. It's still hard to tell about performance because I'm running the stock intake. I highly doubt the muffler will make that much of a difference if the vehicle is still struggling to suck air. Sound wise, it's fairly quiet so far with the resonator still on. I am thinking about removing it. Stupid me, when I had the rest of the exhaust off, and just the new muffler hooked up, I should have fired her up to see what is sounded like straight off the magnaflow.
 

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When I was looking for a more straight thru exhaust, I saw the exhaust pipes were already 2 1/2". Same as catback systems you can buy. I just swapped out the muffler with a Flowmaster 50 series SUV muffler, cut off the resonator and added a dual stainless steel exhaust tip at the end. You can find it at http://www.nitroforumz.com/showthread.php?t=17794 . Mine is post #16 and post #28 is a sound clip. I do have a K&N CAI. I have not seen any impovement with gas mileage with either mod. That is not why I did them though.

70 series is quieter than the 50 series and the 40 series is the loudest.

Good luck.
 

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None of these are true "performance exhaust systems. If it is sound quality and a little better flow, I say just change the muff and be done with it.

Mandrel bends make a better flow than the crimp bend but unless it is a true flow through muffler system then the difference is minimal. Of course there is the argument when every little bit counts............. but that is all on what you are after.

The previous posts are correct, with Flowmaster the Higher the series numbers the quieter the sound.
 

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Discussion Starter #7
Thanks guys, good sound advice, perfect. It's neat to hear the sound clips to get an idea of the rumble too, thanks. I think it's the 70 for me.
 

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Khaki Nitro Nut
07Lifted,4X4,6sp-man,3.7L
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Did my mufler today

Did my muffler today, I ordered a Flowmaster 50 SUV from a local auto parts store.
$110.00 total with tax. I was very excited. What a deal. :Na_Na_Na_Na:
It arrived, I picked it up and brought it home. I took off the stock muffler, pipes and resonator as 1 piece, as I planned to reuse the pipe.
I then opened up the box, pulled out the muffler and ........... well it was the wrong one.
By the way the Flowmaster 50 SUV for the Nitro is the #52557 Center in / offset out, Not the #52556 offset in / center out. :loser1:

So, here I am with the stock set up on the ground and no way to get a new Flowmaster until Monday or Tuesday. @*%&[email protected]!**$&^# :thk:
OK, now what to do. I called around and Schucks auto parts had a Magnaflow that would fit for $74.99. I call my wife and she agrees to pick it up. She gets there and calls to tell me she is getting an additional 10% off. :smileup: 15 minutes later, my wife comes home with it. (Magnaflow #11226. 2.5" in and out.)

OK now comes the good part.
I removed the stock pipe clamp from the old muffler. Cut a piece of pipe to make up the length difference. Welded a coupler onto the pipe and tack welded the stock clamp to the coupler. I then clamped the Magnaflow on to my extension. (I wanted the muffler toward the back to help reduce the cab drone.) I cut the stock muffler off the back section of pipe / resonator. Reinstalled the back section / resonator, utilizing the existing hangers, and clamped it to the Magnaflow. I left the resonator on, as I could remove it later, if I was not happy with the sound.
I was glad for that decision. (I think the Flowmaster would have been too quiet for me and the Magnaflow too loud without the resonator.) Lucky me. :chuckle:
This thing sounds GREAT! At idol it has a pleasing rumble. Accelerating; it starts off fairly quiet, at 2500 RPM + with the foot into it, it roars, but not too much. Cruising at 2500 RPM there is almost no cabin noise. I can still talk on the cell with no issues. I have no way to record the sound, so Pics will have to do.
Here are the results.



 

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Khaki Nitro Nut
07Lifted,4X4,6sp-man,3.7L
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Are there 3" pipes for the Nitro? Benefits/drawbacks?

I don't want to replace 2.5" pipes with 2.5" pipes for $350+... just curious, thanks!
 

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Khaki Nitro Nut
07Lifted,4X4,6sp-man,3.7L
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3" will work but there is no benefit to going that large. The pipe forward of the stock muffler is 2.5". Anything modified forward of that point could void your warranty.
There are some members here that have added headers. I am not sure what diameter the exhaust port is on them. Maybe one of them will pipe in here. (Pun intended)
Your exhaust flow is limited to the most restrictive point, wherever that point is located.
 
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Replacement Muffler for Nitro

Hey ,you should check out cherry bomb mufflers, they have a great sound and fits real good under the Nitro,I changed my muffler only and it sounds great,also you can get this done for around $100.00 bucks, and no noise in the cab, jessman
 

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Hey ,you should check out cherry bomb mufflers, they have a great sound and fits real good under the Nitro,I changed my muffler only and it sounds great,also you can get this done for around $100.00 bucks, and no noise in the cab, jessman

Can you post some sound or video clips for us?
 

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Did my mufler today

Did my muffler today, I ordered a Flowmaster 50 SUV from a local auto parts store.
$110.00 total with tax. I was very excited. What a deal. :Na_Na_Na_Na:
It arrived, I picked it up and brought it home. I took off the stock muffler, pipes and resonator as 1 piece, as I planned to reuse the pipe.
I then opened up the box, pulled out the muffler and ........... well it was the wrong one.
By the way the Flowmaster 50 SUV for the Nitro is the #52557 Center in / offset out, Not the #52556 offset in / center out. :loser1:

So, here I am with the stock set up on the ground and no way to get a new Flowmaster until Monday or Tuesday. @*%&[email protected]!**$&^# :thk:
OK, now what to do. I called around and Schucks auto parts had a Magnaflow that would fit for $74.99. I call my wife and she agrees to pick it up. She gets there and calls to tell me she is getting an additional 10% off. :smileup: 15 minutes later, my wife comes home with it. (Magnaflow #11226. 2.5" in and out.)

OK now comes the good part.
I removed the stock pipe clamp from the old muffler. Cut a piece of pipe to make up the length difference. Welded a coupler onto the pipe and tack welded the stock clamp to the coupler. I then clamped the Magnaflow on to my extension. (I wanted the muffler toward the back to help reduce the cab drone.) I cut the stock muffler off the back section of pipe / resonator. Reinstalled the back section / resonator, utilizing the existing hangers, and clamped it to the Magnaflow. I left the resonator on, as I could remove it later, if I was not happy with the sound.
I was glad for that decision. (I think the Flowmaster would have been too quiet for me and the Magnaflow too loud without the resonator.) Lucky me. :chuckle:
This thing sounds GREAT! At idol it has a pleasing rumble. Accelerating; it starts off fairly quiet, at 2500 RPM + with the foot into it, it roars, but not too much. Cruising at 2500 RPM there is almost no cabin noise. I can still talk on the cell with no issues. I have no way to record the sound, so Pics will have to do.
Here are the results.



So
Did my mufler today

Did my muffler today, I ordered a Flowmaster 50 SUV from a local auto parts store.
$110.00 total with tax. I was very excited. What a deal. :Na_Na_Na_Na:
It arrived, I picked it up and brought it home. I took off the stock muffler, pipes and resonator as 1 piece, as I planned to reuse the pipe.
I then opened up the box, pulled out the muffler and ........... well it was the wrong one.
By the way the Flowmaster 50 SUV for the Nitro is the #52557 Center in / offset out, Not the #52556 offset in / center out. :loser1:

So, here I am with the stock set up on the ground and no way to get a new Flowmaster until Monday or Tuesday. @*%&[email protected]!**$&^# :thk:
OK, now what to do. I called around and Schucks auto parts had a Magnaflow that would fit for $74.99. I call my wife and she agrees to pick it up. She gets there and calls to tell me she is getting an additional 10% off. :smileup: 15 minutes later, my wife comes home with it. (Magnaflow #11226. 2.5" in and out.)

OK now comes the good part.
I removed the stock pipe clamp from the old muffler. Cut a piece of pipe to make up the length difference. Welded a coupler onto the pipe and tack welded the stock clamp to the coupler. I then clamped the Magnaflow on to my extension. (I wanted the muffler toward the back to help reduce the cab drone.) I cut the stock muffler off the back section of pipe / resonator. Reinstalled the back section / resonator, utilizing the existing hangers, and clamped it to the Magnaflow. I left the resonator on, as I could remove it later, if I was not happy with the sound.
I was glad for that decision. (I think the Flowmaster would have been too quiet for me and the Magnaflow too loud without the resonator.) Lucky me. :chuckle:
This thing sounds GREAT! At idol it has a pleasing rumble. Accelerating; it starts off fairly quiet, at 2500 RPM + with the foot into it, it roars, but not too much. Cruising at 2500 RPM there is almost no cabin noise. I can still talk on the cell with no issues. I have no way to record the sound, so Pics will have to do.
Here are the results.



Sounds great (I mean the description), looks beautiful. But would I have to do all that?
 

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Khaki Nitro Nut
07Lifted,4X4,6sp-man,3.7L
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30,538 Posts
So

Sounds great (I mean the description), looks beautiful. But would I have to do all that?
No, you could just use clamps.
 
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