* Longtube Headers with Offroad X-Pipe * Made from 304 Stainless Steel * Engineered for a great fit and performance * Includes O2 Extensions * 1 3/4" Primaries * 3" Collectors * 3/8" Thick flanges Innovative Bold Styling: Manufactured by American Racing Headers in 304 Stainless Steel, longtube systems are engineered for a great fit and outstanding performance. With 3/8" thickflanges, merge collectors with scavenger spikes, direct bolt-in X- pipe, otherbrands simply don't measure up. Systems are available in other primary sizes to accommodate normally aspirated or supercharged applications. American Racing Headers are factory equipment on the 2010 Ford Mustang Cobra Jet. Quality Construction: No one else can Stack up to the bold clean styling of our aftermarket Billet / Stainless Steel Dress Ups, Street / Strip / Racing Suspension and Performance Parts for your American Muscle Car like UPR Products! Fits these Vehicles: 2011 2012 2013 2014 Ford Mustang Shelby GT500 5.4L 5.8L Steeda Roush & Saleen Vehicles. Made in the USA!