I've been running 2mm lowered towers for a while now. I ended up machining my own in my spare time at school before the HB or Spec R ones were readily available to me. The lowered towers make a huge difference in the car. I feel they make the car a lot more aggressive overall. They make the car turn in harder, and rotate better throughout the corner. It made a huge difference for me, I'd expect it to do that same for others.