The muffler's poor construction and improper installation on my car led to subpar efficiency and an unpleasant sound. In addition, the exhaust ends were of poor quality and rusted after only a few weeks of use. Customer service at AMAAM Company was unhelpful and unresponsive when I called them regarding my problems. They obviously didn't value my company or give a damn about the caliber of their goods. Overall, I wouldn't advise anyone in need of exhaust components to use AMAAM Company. They are a risky and unreliable option for anyone looking for high-quality and dependable exhaust solutions due to their subpar goods and subpar customer service.