The GDB STI is one of the last truly raw turbo AWD platforms you can still build without a computer science degree. Between 2004 and 2007, Subaru gave us the EJ257 with a proper driver-focused chassis — no drive-by-wire nonsense, no over-engineered electronic nannies. Just boost, symmetrical AWD, and a boxer rumble that announces itself three blocks away. But these cars are climbing in value fast, and building one wrong means you're throwing money into a ringland failure waiting to happen. Here's what we broke down in this one: → Why the tune comes BEFORE the bolt-ons (your ringlands will thank you) → Suspension setups that don't destroy the car's natural balance → Wheel and tire fitment that actually complements the GDB's wide-body lines → What to look for when you're still hunting for a clean shell The biggest mistake people make with these cars is going full send on power before addressing the EJ257's known weaknesses. A proper protune on a stock-turbo GDB with supporting fuel mo...