Hi Guys. I have a gti Pirelli, considering a flash myself. Would just like to know if anyone with a gti or gti pirelli has raced down the 1/4mile and recorded their pre flash and post flash time and trap speed. As trap speed indicates the power output of a car without the figures being fudged or varied by a dyno. That would be great help in determining the ACTUAL power gain, not what they quote.