Quote Originally Posted by AggieTJ2007 View Post
I believe the nascar is a short track version of the detriot that was designed specifically to turn left. according to detroit's website it has some sort of preload built into it that the other lockers don't
After looking a good bit of searching it seems that the nascar ones on ebay normally are not the short-course only turn left version and the only major difference is stiffer clutch springs. The stiffer springs just make the 'clunk' louder and engages more easily.