The B8 S4 might be the most underrated platform in the German performance world right now. While everyone's fighting over B5s and paying C6 RS6 money for clean examples, the B8 3.0T supercharged V6 is sitting there making disgusting power for relatively cheap — and the 6MT cars are still findable if you know where to look. The supercharger means boost response that turbos can only dream about, and the modular Audi platform means the aftermarket is deep. Here's how to build one properly: → The foundation matters — don't throw a tune at deferred maintenance and wonder why things break → A good ECU flash wakes the car up, but pulley + fuel upgrades are where the 3.0T starts to feel genuinely fast → 19x9.5 ET35 is the fitment sweet spot — aggressive without pulling fenders or eating tires on highway pulls → The 6-speed manual is non-negotiable if you're building one to drive, not just to own These cars are in the window right now where clean 6MT examples are affordable but climbing. Th...