The Porsche has gotten faster over the years, more technologically advanced, safer — and heavier and tamer. From 1993 to 1998, Porsche made what any true enthusiast considers to be the ultimate 911 — the 993. It was the last of the air cooled 911s and the final say on a sports car philosophy that began in 1964. The Gunther Werks 400R is what the company imagines would be if Porsche had made a factory 993 GT3 RS. Gutted to the chassis, each donor 993 receives frame stiffening, custom carbon fiber body panels, and the centerpiece 4.0 liter, 400 hp flat-six that replaces the original 3.6 liter engine. Some people look down on trying to improve a classic, but even Porsche would be proud of the 400R.