I've searched on this forum for this answer but couldn't find anything. I have a 2007 IS250 and am looking for a full exhaust system. Which is the most conservative sounding exhaust Greddy, Magnaflow, Tanabe, or HKS? Or if you have any suggestions any info would be appreciated.

 

You could try an HKS gs430 Muffler. I quite enjoy the sound. It adds a low deep High tone when hammering the gas. Ive been seeing other cars with 350z Y pipes and doing a ghetto mixture of the gs430 exhaust lol

www.youtube.com/watch?v=YeKXhYmn1y8Here's a video of a single one. If you've got the money go dual lol