so a little back ground on the car before the kill story, its a 2004 rainier bought new by my father who owns a 71 Gs 455 four speed. This was my first car, its a v8 body on frame IFS four link rear Buick from the 21st century in my opinion a true modern muscle car. The trailblazer SS was the performance trim level chevy on this platform. Being a Buick faithful i wanted to make the equivalent trim level on the Buick model, the Rainier GS. So the car has a 5.7L ls6 with custom ground cam, 11.5:1 compression, built transmission with shift kit and 2400stall, and a few suspension modifications. after a week of trying to fix some ground wiring issues I was testing the instrumentation so as i was merging onto i-485 in charlotte I checked my mirror and brand new Mercedes AMG GTS is sitting right and my rear tire. As I'm accelerating to merge ahead of him I hear him down shift twice trying to keep me from mergeing so i roll on the throttle in 4th and shoot in ahead of him. After doing this he sits about a foot off my bumper half a mile later traffic clears merc still a foot behind me. He moves over a lane accelerating hard, his twin turbo v8 making a very german howl. when he gets to my quarter panel i open the throttle and the transmission kicks down to second with an athouritative bark from the tires:3gears:. Guy in the AMG looks over shocked probably has never heard traction broken at speed before:shock:. He's still hard in the throttle when i barked into third and start to slowly put some distance on him as speed continues to climb well off the speedometer. I glance in the side mirror and the guy looks pissed, i guess he didn't like that his $130,00 :dollar: German engineered Messerschmitt didn't have enough for a "stock" Buick suv:af:. At this point i return to cruising speed feeling a bit chilly adjust the air-condition. When i get back home and look up his car Mercedes claims it runs 11s in the 1/4 with its 7 speed dual clutch transmission that they claimed shifts faster then you can blink.