GTI vs '03 sl500 vs ecoboost mustang

This morning I went on a drive from Phoenix to Payson, AZ with a couple of buddies, who drove a 2003 Mercedes sl500, a 2015 Mustang Ecoboost, and a 2014 v6 mustang. Along the way, we did a couple of pulls. I did a 50-100 pull against the mercedes, and put about 1.5 cars on him. Against the ecoboost mustang, I did a 10-110 pull. He started about a car length ahead of me, but in the end I was about half a car ahead of him. With the 2014 v6 stang, we did a 40-90 pull, and I had about two cars on him before I let off. All cars were stock, while I have only a catless dp. Was quite the eventful morning!

Nice job! Sounds about right, I can't imagine you would catch much traction starting from 10mph, especially with a downpipe.