They work fine in most autocrosses.
I have a blast with mine on the road courses.
Hop in and go for a spin in my Impala at BIR's 3.1 mile track....
http://www.facebook.com/#!/video/vid...6327456&ref=mf Watch the whole thing, as it kind of interesting towards the end.
Autocross
MAM - Mid America Motorplex
BIR - Brainerd International Raceway
Wilwoods, ram air hood, and Hurst shifter
Donuts....
I hope you get to enjoy your car as much as I enjoy mine. Mine is a few miles shy of 190k and has never had a valve cover off or any internal engine work.
Randy