My friends all have them in their drag race cars. What happens when you take a corner? What does that do to your tires, axles, and other rear end components? Maybe even further up the drive train. How many miles do you put on your "street" cars with a spool? I would never run a spool on the street. You guys can run race cars on the street, but would you run cross country through NYC in stop and go traffic for hours or going over the Rockies through switchbacks?