Actually, both runs were done with the stage one kit. Here in the south it stays warm so much of the time, it'* hard to get runs in where its cooler than 60 degrees. Both of those runs where in 60 degree plus weather. When I opened up the exhaust it made a big difference in how the car performed. So we can say that for less than 1500 total dollars, I've taken the car from 16.4x to 15.088. All this inside of a year.