Originally Posted by MaysEffect

No point of beating a dead horse, control arms were already suggested, an LSD is an age old recommendation as of now, it's a matter of cost and total usage. Several people have gotten away with using the factory differential at the track including myself with several cars. Of course there is a limitation, but adding a new one comes with increased complexities in both drive-ability and wear. In most cases using the standard setup up first at the track with different tires gives one a better base line for expectations and measurements against mechanical and geometrical changes.