You already know the role that the exhaust system plays in your Ford Mustang. Since there is no way to avoid having exhaust entirely, you need to be able to have your system finely tuned to ensure that you get maximum performance out of your 4 cylinder of V6 engine. Most likely, your ride has a stock Y pipe. This means that all exhaust is forced into one tube. This loses a lot of efficiency and power. If you don't have a Y pipe, then the odds are that you have an H pipe. This configuration leaves much to be desired as well. A Roush X pipe is a must if you are upgrading your exhaust system. You really do want to have a mid pipe set up that lets the exhaust flow smoothly from the header and then out through two pipes so that there is only a small amount of back pressure. The smoother flow that you get out of a Roush X pipe will give you a better sound on top of a better flow. This pipe is made from stainless steel. This material is naturally resistant to rust and corrosion so that it can last you for a long time to come. It is custom fit to exactly fit your Ford Mustang. Let your vehicle have better sound and performance by installing a Roush X pipe. You certainly deserve great sales assistance while shopping for good quality auto parts for a car or truck. So of course we've created a twenty-four hour a day technical assistance bureau to address your questions. Nobody likes to pay for shipping, so you always get 100% free shipping for every order at least $50. If you find a better price, tell us - we always beat any advertised price for auto parts.