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Exhaust 5.7 HEMI Exhaust Discussion


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  #1  
Old 07-08-2013, 02:27 PM
vancat74 vancat74 is offline
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Default Which Exhaust, Flowmaster or Mufflex?

Simple question, will I gain anything additional from getting the Flowmaster exhaust system 817477 compared to the Mufflex muffler swap? I know that the Flowmaster system has the resonators already removed. Is the Flowmaster exhaust pipe any larger? I have a 2013 Sport.
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Old 07-08-2013, 02:44 PM
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Honestly, you aren't going to gain much no matter what exhaust system you choose. Any gains you do get will not be noticeable.

The Mufflex muffler swap uses a Magnaflow muffler which is a straight through design and therefore flows better than a chambered muffler like a Flowmaster. But there's going to be very minimal difference between the two. Especially if an exhaust is all you're doing... You should base your decision more on the sound you like more than anything. Flowmaster will be louder and more raspy. Magnaflow will be quieter and more smooth. I'd suggest looking up some videos on youtube and listening to them with some good headphones to get an idea for the sound. I have a sound clip of my Flowmaster exhaust linked in my signature below if you're interested.

No matter what muffler you choose I would recommend removing the resonators. They are meant to work with the stock muffler. An aftermarket one is meant to work and sound good without them. There are reso delete kits out there than you can buy.
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Old 07-10-2013, 09:52 AM
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Quote:
Originally Posted by vancat74 View Post
Simple question, will I gain anything additional from getting the Flowmaster exhaust system 817477 compared to the Mufflex muffler swap? I know that the Flowmaster system has the resonators already removed. Is the Flowmaster exhaust pipe any larger? I have a 2013 Sport.
You won't notice a change in performance unless you reinstall the resonators, then maybe a slight decrease.
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Old 07-10-2013, 01:39 PM
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Originally Posted by Spike View Post
You won't notice a change in performance unless you reinstall the resonators, then maybe a slight decrease.
This doesn't even make sense.... Are you trying to say by adding resonators to the Flowmaster catback (which would be stupid) would give him a decrease in power over the stock exhaust?



OP, just saw your comment about the Flowmaster pipe size. The Flowmaster system comes with a 3" inlet and dual 2.5" out with 3" rolled tips. The stock exhaust is 3" inlet and dual 2.25" out so yes, it is bigger.
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Old 07-10-2013, 02:42 PM
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Why not just get a Mufflex or Magnaflow catback system instead of the Flowmaster. You'll see more performance gains that way and you'll be spending the same as if you were buying the Flowmaster catback. you wont see any gains if you just do the Mufflex muffler by itself nor with the Flowmaster catback.

Just curious but why are you comparing a muffler to an entire catback system when you could just do muffler to muffler or catback to catback?
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Old 07-10-2013, 08:42 PM
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the thru flowing Mag/Mufflex will perform better than the chambered Flows...these hemi's like to breathe...
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Old 07-10-2013, 08:45 PM
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Quote:
Originally Posted by Gecko View Post
Why not just get a Mufflex or Magnaflow catback system instead of the Flowmaster. You'll see more performance gains that way and you'll be spending the same as if you were buying the Flowmaster catback. you wont see any gains if you just do the Mufflex muffler by itself nor with the Flowmaster catback.

Just curious but why are you comparing a muffler to an entire catback system when you could just do muffler to muffler or catback to catback?
Yeah, good observation...
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Old 07-12-2013, 11:32 AM
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the key here is whether you do catback or muffler swap..change the Y pipe out too.. you will then feel the obvious difference in your exhaust upgrade.
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Old 07-12-2013, 03:14 PM
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Quote:
Originally Posted by chefred112 View Post
change the Y pipe out too.. you will then feel the obvious difference in your exhaust upgrade.
...... and the horrible crimp of the DS bank pipe under the transmission.

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Old 07-24-2013, 09:39 PM
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Honestly I never looked at magnaflow catback. I am planning to get a catback system. Looking at flowmaster, magnaflow or corsa right now.
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