I bought the BWR street/track version and could feel a significant difference between the stock elise bar with my A6's at my last auto-X. The thing that really doesn't say it all about your post is what you intend to do with your car. If it's auto-x and you are running R-compounds, I would recommend it from my limited experience. I plan to run on the middle hole for one more event (provided it doesn't rain) and then decide if I need to go stiffer. The bar performs as advertised, really helping the car to rotate nicely in tight turns as well as keeping the inside rear on the ground.