A muffler clamp attaches your vehicle's muffler to the exhaust pipe, and seals the connection between the two parts. A rusting muffler clamp may cause your exhaust system to leak, or totally fall off over time. Hence, it is important to replace a muffler clamp that is already showing signs of age. Below is a reference to help you when purchasing one:
To hold the exhaust pipe in place, it is necessary for the muffler clamp to be the right size. You can buy a clamp with the same size as your exhaust pipe, but a good safety measure is to go for a size one-step larger than your car's pipe. Is your vehicle's pipe two inches in diameter? You can opt for a 2.5-inch muffler clamp to be sure.
There is no required material when choosing a muffler clamp, this is mostly just a matter of taste. Most of the clamps that are available on the market these days are stainless steel, aluminum or galvanized iron. Whatever kind of material you would go for is okay since it won't have any bearing on your car's driving performance. As to their longevity; stainless steel, aluminum or galvanized iron are of roughly the same lifetimes. However, galvanized iron can be plated with yellow or white zinc on the surface, so it's a plus if you are looking for something more aesthetically unique.
Individual or kit
Some muffler clamps are sold individually because they are specifically manufactured for a certain vehicle. Others-mostly adjustable clamps-are sold in kits. It is important to check what kind of muffler clamp is most suitable for your vehicle, most especially when you are buying individually because muffler clamps are categorized based on fit location. Choices include: rear band, front band, lower-clip and upper-clip. If you have money to spare, the best option is to go for kits; even if you are only planning to replace the lower-clip, you can keep the rest of the components for later use.