The third-generation CTS builds on the ATS’s Alpha foundation with larger wheelbase and track dimensions. To optimize mass efficiency and to achieve a [near] 50-50 weight distribution, we created over 40,000 analysis models. We specified aluminum for most of the front components, positioned the battery at the rear of the car, and counted every gram to gain a 200- to 300-pound weight advantage, Leone adds. We targeted both the E90 [2006-2013] BMW 3-series and the current 5-series. When the 5 got heavier, our task became easier.