Installed one of these on the old M&M on my 1996 Road King. Darn thing seems to really work! Increased my mpg by 2 and got rid of the stumbles I have had since installing stage one with a RevTech DFO. It's kind of spendy but searching on line I found it 100.00 cheaper than list. Since 1996 featured a non flashable ECM, I think this is a bargain!