Pretty Happy With The Purchase On Flat Surfaces You Can’t Really Feel Much Of The HP (It’s Just 10+) But I do Feel It Going Up Hill My Truck Would Struggle To Go Up And RPMs Would Rise Up Crazy But With This It Went For It And Wasn’t As Loud When It Would Struggle Pretty Happy About That. It’s A 3/5 To Install Just Make Sure You Have The Right Tools. 🤙