ok, i recently made the switch from honda to toyota.....im looking to order an exhaust any day now, but am still debating whether to go for the hks dragger ii, or the greddy evo.....anyone have any input on the topic? any info is much appreciated, the only real thing i can figure is that the greddy is a cat back system, and the hks is just a universal muffler, basically.....any power differences? sound differences? do i have to perform surgery on the cat converter to install the greddy? i had an accord with a apexi cat back, and had to saw off 3 inches of the cat cinverter and reweld it so the whole thing fit properly...and advise is much appreciated....thanks a lot....