Performance mufflers are a great addition to your automobile. Not only to do they give your car that sound you’ve always wanted, but they also relieve some back pressure created by the restrictive factory systems. Relieving back pressure not only increases engine efficiency (Horsepower and torque) but also allows you to obtain more gas mileage out of your vehicle. Performance mufflers come in all shapes and sizes as well as several different types of metals (aluminum, stainless, titanium, and coated). To name a few Flowmaster, Magnaflow, Hooker , Bassani, and Corsa, have all been thoroughly tested and gone through years of research and development.