I'm amazed at how many people advertise that they have a mid 10 sec. car when all they do is build a "10 sec combo" and automatically it's a "mid 10 sec" car. I had a "10 second" combo for the last couple of years and the car never went tens until I built a 9.99 combo. I don't think those people know what it takes to make a 3600lb car run mid tens. How can you never go to the track and say it's a 10 sec car? 
