me and my friend decided to race today. my cars just got an open k&n filter, and his car is totally stock. we started from a roll, i don't know how fast the roll was cuz my speedo dosn't work. approx 10-15 kmh. we probably raced up until 150 kmh or more, then i backed off. all i can say is that these cars can't be more evenly matched. we stayed right beside each other the whole way, neither of us were gaining on each other. although he took off first b/c i honked 3 times and he went on the third honk, but i went after the third honk, like 1,2,3, go kinda deal. but it was really even.