I was the 7th place driver in STX for the SCCA Solo Nationals.
The Feal 441's are on my car and Lance's FRS who took 4th place. They are a great option for autocross. They are simple and they work.
Once you get your ride height set to your specs it requires very little dial in time. The 441's are also a 1/4-1/3 of the cost of most of the suspension setups that trophied around us.