The rear wing is stock and so is the S: 2002–2008 — 1ZZ-FE — 1.8 L (1794 cc) I4, 16-valve DOHC, FI, VVT-i, 130 hp (97 kW) — CE, LE, S (TRD 1.8L Supercharger is available for this engine). So he or she might have the TRD supercharger hence the sticker. With a redline of 5600 rpm in that Yamaha sourced supercharged engine its quite fun!