On 2004 Executive I used Firestone W013589376 on the 4 front bags and like it with the 1/4" inlet. DaBus seems more stable in the front. It might ride a little Rafferty depending on the road!
I have about 8k miles on the new bags going from AZ to WI, then AZ to Reno with no problems.
When climbing a grade I watch the Tach not the speed. I have a 2004 ISM 500 hp Cummins 4000 Allison, I keep the rpm between 1500 - 2100 rpms. Safe Travels!
Mine 2004 Monaco Executive, the low would work but no high. Turn that the switch on the left control panel had a bad connection. Easy fix after mechanic checked, foot switch, wiring to engine and pulled rocker cover. That was my problem!