I have used almost every exhaust for the mkiv in some timeor another on my past supra or ones that I have worked on, and must say that the Super Drager is one of my favorites. Right now I am using the HKS Carbon-Ti, but on my past T04R supra, I went back to a Drager for the deeper and more mellow sound (rumble) I love the N1 and too since its like the HKS Hipers too, but personally indifferent about the GT spec. Just my two cents.