I ran CalTracs on the street in my Hemi 4 spd car. I liked them very much. No more wheel hop and I quit having issues with bent springs. The 'ol monster used to eat up springs and pinion snubbers on a regular basis. Once I put on the Caltracs it never happened again. One tip though...don't use any preload on them when running on the street..OK for the track but very bouncy for the street.