Maybe only trans brake cars do this ? I dont know. I recently had the T-brake installed , watching video of the car in Reynolds on the first really hard launch (tires about a foot off ) I noticed a significant vertical crease at least 10" in the rear quarter panel behind the rear tire. I'ts actually intresting to watch in slo-mo. As soon as the rear tires hit the crease appears , the front tires come off the crease gets bigger (looks like a big dent) and as they touch the ground the crease goes away. The car launches perfectly even no twist . Any comments, suggestions that might help would be appreciated as I dont want to bend / brake the body or frame.