Oh man the UD60 is my dream. I am jealousAre you looking for more performance? If so and what it gives you is worth the $$$ to power go for it. I did the procal tune and I am happy with my power. I am actually afraid with my use to build more as I do not believe the powertrain is designed to handle to much more once you add tire weight, vehicle weight regear and then push the power in a 4L locked situation. I am waiting on my UFD and Ultimate 60 to arrive so I can use what I already have. If you mostly use it on the road, go for it. 3300 rpm locked and sawing aired down 37's trying to find a bite on wet muddy rock ledges.... snap.