Apples to oranges here guys. Each has their place is their respective racing sanctions. UPR, Team Z and Racecraft are all geared toward lightweight setups that perform in a straight line. Their k-members are bare bones, but work great for a drag setup. On the flip side, an MM k-member weighs more but is more stout to handle the abuse of road racing. It creates an extra reinforcement point for the front end of the car and reduces chassis deflection for better handling. Most drag racers are not going to spend the extra money on MM stuff when all it does to them is add weight.