I know on my Rancher I had I put the HMF exhaust and bought their controller and never had to touch a thing on the adjustments. The thing pulled like a mother from a dead stop to the top end in 5th gear. In stock trim, I had to climb hills in first gear only because it bogged down too much when I shifted. With the HMF goodies on, I could start in 1st and be wound out in 3rd by the top. Once I get to the point where I have the $$$ to get the exhaust and programmer for the Wolvie (being a diehard Ohio State fan, saying the full name is tough lol), I know exactly where I'm going!