Hummer owners are known to be, well, a little tough on their vehicles, so make a point of checking your Hummer exhaust system once a year. You bought that Hummer because it can handle tough road conditions, but the exhaust system components can be vulnerable to damage by weather and hard knocks on the road (since the exhaust parts are located on the underbelly of your Hummer). A tough winter that brings salt, moisture, dirt and extreme temperatures can be very rough on exhaust parts such as the muffler and pipe. Or, worn out brackets, hangers, clamps and heat shields might be knocked loose from road debris. All of those can mean a hazard to yourself and others on the road, if your Hummer exhaust system is not regularly inspected for wear. Make a point of visually inspecting your Hummer exhaust system to see any damage, rust or corrosion on the parts. In addition, do you have a very noisy engine or a rough idle? Damage to the catalytic converter, muffler or resonator can cause that noise in your Hummer exhaust parts. Poor fuel economy and weak horsepower are also indications that your Hummer exhaust parts might need to be replaced. Order through car-stuff.com to replace any worn out Hummer exhaust parts, and ensure that your vehicle will remain running quietly and efficiently.