I put a Greddy Ti-C on my manual IS300, and I've never been happier. The beast ROARS and with AEM Short Ram Intake, its the perfect mix. Everyone just asks how powerful it is, the most beautiful sound in the world to me.

 

I put on a HKS Dragger and I can't tell that it is on the car if I am cruising. If I get on it a bit I can tell right away.

Also I have heard Apex84's exhaust, the Greddy, and his sounds really nice also.