98 2.0 GTI running a Bahn Brenner cross-flow supercharger. I had way more money in parts in the car then the car was worth by itself. It was temperamental, quirky and oh, so much fun to drive. I had it set up for autocrossing so it handled like nothing it compares to.
The heart of the beast:
The major mods (besides the SC) were Bilstein PSS9 coilovers, ACT 6-puck clutch, and a Peloquin LSD.