5 star tuners

I purchased one new for my 2007 Class c about 4 years ago, it made a huge difference in the way the engine preformed and transmission shifted. Traded in that coach and switched it to the 2018 class A and had to upgrade the system. Still think it was and is a good addition to the coach. When time comes to get rid of the rv I will un-install the system and sell it as used, but fully functional and recoupe some of my money.