5 Star tune not only helps the shifting on the V10 but give it a small increase in HP and TQ. Well worth it for the shifting but we also saw an improvement in hill climbing and mpg actually increased 1 to 1.5 mpg. Was last month on our trip from California to Utah and back towing our jeep. Our friends who travel with us all the time said they could see a marked improvement in the way we were able to get down the road. Highly recommend this for any V10 motorhome.
Rick and Patty
2006 Holiday Rambler 30PDD,Sani-Con,Sumo Solo Springs,5 Star,Radio Labs,
MagneShade,Progressive Surge Protector,EEZRV TPMS,2009 Jeep Wrangler