Originally Posted by Maverik259
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.