HKS Super Sound Master Exhaust | Nissan 370Z (Z34 6MT) (32023-AN005)HKS released their Super Sound Master line of exhausts to do just what the name implies, create a perfect balance of performance and sound. Just like high end performance vehicles, the Super Sound Master line will provide you a subtle sound during normal driving and a deep tone when you open up the throttle and put your foot down on the accelerator. The SSM series of exhausts began with the 350Z VQ35DE, so f the Nissan 370Z the SSM cat back has been