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Exhaust 6.4 HEMI Exhaust Discussion

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Old 09-07-2015, 05:08 PM
GlassAudioGuy's Avatar
GlassAudioGuy GlassAudioGuy is offline
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Join Date: Aug 2015
Location: The Great State of Maine
Posts: 53
Gender: Male
Vehicle: 2015 Ram 2500
Trim Level: Tradesman
Color: Black Forest Green Metallic
Engine: 2014-20?? 392ci (6.4L) Hemi V8 410hp 429lb/ft
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Default Exhaust Mods Work... With Proof!

When I first picked up my 2015 6.4 2500, I thought it would have more power than it did. After careful break-in, I turned off the traction control and stomped on the gas. Wow! A disappointing big delay and sluggish movement until it hit about 2500 RPM. Not even a tire chirp. So.... I finally built a new Y pipe and installed the Mufflex Magnaflow and adapter pipe. In the first picture you can see the nice dark rubber burnout and from the other end you can see the transition where it shifted into 3rd gear. Then it just pulled without spinning the tires anymore. Oh, BTW, I locked the trans so it would not shift above 3rd gear.
The last 2 pictures show the thermostatic valve in the muffler that only is supposed to open fully when the high heat from full on acceleration opens the valve. That's correct. Its held closed by a thermostatic spring. Talk about a choke point! As you can see in the last picture, I had a bigger problem. My valve won't open past 80% because there is a weld blob that gets jammed against the side of the tube not allowing full opening. That's why I got the screwdriver jammed in there to show how far it opens.
Anyway, now that I did this mod, I need to be careful at stoplights not to smoke the tires and bring Jonny Law down on me.
Attached Images
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File Type: jpg DSC00594.jpg (131.4 KB, 25 views)
File Type: jpg DSC00597.jpg (46.6 KB, 34 views)
File Type: jpg DSC00598.jpg (50.4 KB, 35 views)

Last edited by GlassAudioGuy; 09-07-2015 at 05:10 PM. Reason: Grammar
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Old 09-07-2015, 09:31 PM
Burkdadhemi's Avatar
Burkdadhemi Burkdadhemi is offline
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Join Date: Aug 2008
Location: Alabama
Age: 55
Posts: 657
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Vehicle: 2008 Dodge Ram 1500 4X4
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Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
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That's flapper is to help with drone. Sounds like you have it running better

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