the Accelerated E 55 500hp v8 is the least amount of money output, overall, when i was going to do mine, it was about $50,000.00 to do the Hemi, and a lot less for Rudy to do the E55,, you see with the Hemi the key does not work the windows are on a switch then the window up/down buttom. and some other things. or you could strip all the wiring out of the frame and install a wiring harness from a charger from tail light to headlights. you want to go fast and not spend your life saving go with the Merceded E55, either you do it or you let accelerated do it turn key. jim