I was watching the Continental Tire ST series on Speed, specifically the NJ race. They were talking a lot about having to toss the stock differential and get Multimatic to redesign a new LSD that wouldn't just sit there and spin one wheel. It sounds like this LSD will be an expensive but maybe necessary upgrade. They also mentioned that they were also having trouble with the shocks heating up and seizing which causes the car to bounce around. Hopefully the cars will become competitive later in the season once they get the bugs out. I'm sure there are going to be a bunch of upgrade parts coming from this racing program.