Enginewise, there aren't many for the 3G TL other than the CAI (Injen, AEM, K&N) and exhaust by Comptech. You can also mod the suspension via springs (Eibach, Tein, H&R) or coilovers (Tein, Aspec). I believe Tokico has struts available. And don't forget to add the CT RSB to the list. Exterior aesthetics are also available like the Aspec kit or the RonJon body kit (below). Add custom wheels and tires and you're pretty much good to go.