Originally Posted by dawgdog
I am on to a different car now but ran the AST 4200 for 25 plus track days and was super impressed with them. Easy to set up and with a few clicks of rebound that took about a minute was comfortable on the street. I personally am skeptical that the RS1 offers a clear advantage to the AST.
There you have it, a happy AST 4200 customer!
When properly setup I have no doubt the 4200 series offer performance advantages over the RS1.