Mufflers are an important part of any car, and they can range in price from about $30 to over $200. The average cost of a stock muffler is around $50, but it really depends on the make and model of your car. If you have a luxury car or a performance vehicle, you can expect to pay more for a muffler. Mufflers typically last for the life of the car, but if yours needs to be replaced, it's not going to break the bank.