The cost can vary depending on the material, make/model of your vehicle, complexity of the job, and labor costs. You have to get it made out of high-quality stainless steel pipes, the complexity depends on the underbody of your vehicle, and you may need additional parts like brackets or exhaust tips. The whole job can cost anywhere from as low as a couple hundred dollars to $1,500-2,000. It is a good idea to get quotes from different shops and mechanics.