One way to describe it is it makes the motor feel like a 3.0L. The smaller pulley makes it feel like a 3.5L. All without making it feel like a tank. Still light and nimble with adequate power for corner exit and straight aways.
I had my friend who has a stock frs drive it. Before he started it up he said "so does this thing really make a difference?". I just grinned. His

after driving it was priceless. I have a feeling he's gonna go buy one now. Lol