I've had my Yonaka on now for about a year or 30k miles as seen in the title. It still sounds great. However the axle back section is starting to rot a little and just recently I got a horrible exhaust leak. Turns out there is about 1/16-1/8 of an inch gap in the very front/bottom of the resonator. As if the can was only crimped onto the pipe and adapter. I'm a little disappointing at the quality but for $250 it sounds great.