Some want the MDS off do the system over time can cause the "Hemi Tick" which is the cam lobe being chewed up by a hydraulic lifter roller. The oil ports are small in upper engine area of the 5.7 and the MDS is blamed for oil starving that particular lifter and cam lobe. Also, when MDS kicks on, the ...

Ok, say you already installed your tune rather it be 87 octane, 91 CAI, or 93 Octane, you have to install a tune of your choice first. Then if you want to turn MDS off, you choose the tune, the go to modify parameters, then you will see MDS on / off. Select off. the download tune. You don't have to ...