For some time, if you wanted to go fast in a two-door Audi in the U.S., you had to make your own car from pieces of others. Even if you selected the much praised Quattro, you had a fairly heavy car to start with that was coupled to a rather measly 160 horsepower. Unless it’s snowing, a bone stock Ford Fiesta ST will pretty thoroughly stomp all over the legendary boxflared wonder in just about every situation. So people began modifying the turbocharged cars to produce more boost and bring them into line with their European counterparts. Of course, when it came to the replacement for the Quattro, those that waited longingly from 1985 until 1989 for the next turbocharged coupe were greatly disappointed. Sure, the new 90-based B3 Coupe Quattro had 20 valves under the hood – but no turbo came here. Europeans enjoyed several iterations of the turbocharged B3 and B4, including the Porsche tuned RS2, but in North America only the normally aspirated, slightly portly 2-door hatch came here. Again, it was no surprise that as soon as they were outside of warranty, people began to tinker; in this case, making their own S2s out of pieces from their bigger brother 200/S4s. Installing the 20V Turbo into the engine bay instantly transformed the Coupe Quattro from competent cruiser to sleeper assassin: