What changes do you need to make an 2008 Dodge Magnum towable 4 wheels on the ground?

A 2008 Dodge Magnum is not designed to be towed four wheels down. It requires a different towing method, typically flatbed towing. There are no changes you can make to a Magnum to allow for four-wheel-down towing without significant and likely unsafe modifications.

Attempting to tow a Magnum four wheels down will likely damage the drivetrain (transmission, transfer case, etc.) The vehicle's weight and the turning of the wheels while being towed will create immense stress on components not designed for that kind of use.

To tow a 2008 Dodge Magnum safely, use a flatbed tow truck or a dolley tow that lifts the front or rear wheels. Consult your owner's manual for the manufacturer's recommended towing procedure.