My friend has a 2001 chevy extreme with the V6 and a stick with some mods and I beat him twice in a row from a dead stop to 100mph by three to four carlengths each time. I have 99 GLE with a custom CP racing intake, apexi exhaust, g-box chip, and an auto. He went to the track yesterday and ran a 15.8 standing quarter, if i can beat him by three to four at 100mph, what should i be able to run in the quarter?

 

15.5-15.6. What's a G-box chip?

 

here is a g-box performance chip
g-box performance module

 

Have you felt a noticeable difference in the performance of the car since you installed that, or was it a rip-off?
Thanks,
Dan