I had big bores on my car, Outdoors when the track was really bumpy and dry they worked REALLY good, indoors damp/smooth, lots of grip, they made the car feel really lazy. It was easy to drive, but slow. I switched back to the stock shocks, and it was much better, just bottoms out again if I dont land just right. Plus, you have to get a little creative when mounting the big bores, no big deal, just a few spacers here and there.