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Discussion Starter · #1 ·
Wanted to share this here since this seems to be the first set purchased! I am still waiting for tuning before I install these but with the July 4th deal that I got, I couldn't refuse. They do have the Airborne 1700 degree polished silver jet coating. These will be bolt to non-catted mid-pipes and Corsa cat-back (which are getting installed as you read this).
A major thank you to Branden!







 

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2018 Jeep Trackhawk
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in for anything on these
 

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Discussion Starter · #5 ·
These wont be going in until tuning is available for the 13's (not willing to replace my computer for a '12 computer). If you are a "authorized Mopar tuner" you shouldn't need to replace my computer....
 

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the problem with the 13's was a lot of the parameters and adaptives were changed. For instance....the track mode in the 13' is 70/30 rear bias split where in the 12' its 60/40
 

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how will headers affect the '14 wk2 6.4l with the fuel saver mode? If i remember correctly the OEM headers/exhaust have that active valve system to help with the pressure when switching between the v8 and v4 modes...
 

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2014 Jeep SRT8
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how will headers affect the '14 wk2 6.4l with the fuel saver mode? If i remember correctly the OEM headers/exhaust have that active valve system to help with the pressure when switching between the v8 and v4 modes...

Lol, you can open them by hand. I took off the rearmost mufflers and then wired them open. Now instead of a "hand over the muffler sound" I get great v8 songs from idle...

They are there for sound only. The MDS mode is louder, but way louder at 80. 60-75 is just fine, or tune it out... I have no ill effects whatsoever. No drop in 0-60, therefore there is no loss of low-end. MPGs are exactly the same, and don't dive like I have heard. Those damn valves draw up so much stuff, but are only there to quiet MDS mode.
 

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ah so its all in the exhaust not in the headers themselves. They're explanation on their websites aren't the clearest since they talk about it under the headers section but mention exhaust.

So they just adjust the opening of the muffler to adjust for the less flow and thus adjust the sound output. Wonder how tht would work with exhaust other than stock.
 

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I would imagine they design around it. Honestly having headers and an exhaust you shouldn't worry about mpg, but if you are, just prepare for a little bit more noise. I am fine with mine, especially the way it sounds just driving around town. I don't have to floor it to get a roar...
 

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i c. So it's simply a design thing for sound. How would it affect the fuel economy? Is it just by adjusting the back pressure....
 

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It says helps by keeping MDS mode engaged longer with no definitive value. Could be 1% or 10%. What I can tell you is that my valves are open, and I have no codes or negatives...
 
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