We just released a new water methanol injection system for diesel pushers. It comes with a long harness specifically designed for these platforms. http://www.snowperformance.net/diesel-pusher-rv-motorhome-mpg-max.html
Here's a video talking about the difference in the TowMax and MPGMAX Systems: http://www.snowperformance.net/index.php?view_video=1
Here is a great testimonial: "Big Thanks to Snow Performance. Friday night i tested what a Snow Performance Max-Mpg kit can do for a Duramax. I was at Pueblo Motorsports drag strip, and these were back to back runs ! (2011 GMC 2500hd 6.6L LML Duramax, 8" lift, 37" tires) 1/4 mile time with Max-Mpg turned off. 14.8@ 94mph 1/4 mile time with Max-Mpg turned on in tow mode, 65% injection gain. 14.056 @ 102.45 I have to tell you, everything Snow Performance claims about their kits is 100% truthfull!! I highly recommend their kits to anyone looking for a safe gain in horsepower, and faster times. Thanks again Snow Performance for leading the way!"