I have run tunes on many of my vehicles. I bought the 5 Star for our 2004 MH and it made a huge difference. The shifting strategy for the 4 speed trans is so much better. When we sold the 2004 I returned it to stock. I then bought a tune for our '19. Seeing how I already had the programmer, a new tune for the '19 only cost $100. It has been on the '19 since the second week of ownership (almost a year now and over 4k miles). The improvement wasn't as dramatic with the 6 speed as it was with the 4 speed. I am pleased with the tune but not as much as I was when I tuned the '04.
If you have an older MH with the 4 speed trans, I would not hesitate to get a tune. It makes the rig so much better to drive.
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2019 Miramar 37.1
2013 Honda CR-V Toad
2004 Georgetown XL 370TS - Sold
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