This 2013 WRX STI is a classic, driver-focused setup: Tomei equal-length headers and Invidia catted downpipe free up exhaust flow, COBB intake and Accessport make tuning straightforward, and FastWRX oil pickup and baffles keep lubrication sorted under load. Chassis bits like Turn-In Concepts pivot bushings and Kartboy shifter bushings sharpen mechanical feel and feedback. The package is practical, purposeful, and very much about extractable performance — a car built to be driven hard and maintained carefully 🧰.