If you get a rear bar too, go with an adjustable one like the FM bar. It seems that car power, driving style, springs, and autocross vs track have a big affect on rear bar preferences. I run the FM front bar and have a lot of power... In my limited experience and experimentation, I seem to prefer less rear bar autocrossing (OEM bar is good, FM full soft seems better, FM mid setting too much) and a little more rear bar for track (OEM too little, FM full stiff too much... have not decided if I like FM soft or middle best).