I have had the banks power pack on 2 motor homes class A and it was a waste of money as far as I am concerned. Very little if any change in MPG Power was hardly noticeable. The last motor home I had before my present one had banks headers and ram air. It did make a difference, but still was not worth the money and return on the dollar. The money would have been better spent on something else.
2006 Four Winds Hurricane 31D, Steer Safe, CHF, 50 Amp Conversion, 3000 Watt Inverter, Toad is a 2007 Jeep Liberty Sport. Blue Ox Aladdin Tow Bar, Apollo Braking System