The 2016-2020 Shelby Mustang GT350 5.2L flat plane crank V8 engine is the definition of high performance. If your looking to improve on performance, look no further than the American Racing Headers Long System. Available with your choice of 1-7/8" or 2" primaries (for max effort applications), our Long System is constructed entirely in 304 stainless steel and features a 3" X-pipe. A simple cut and mark installation (no welding required) joins the Long System to your existing configuration. Also available as a Direct Connect System and Full System including our Pure Thunder Series mufflers.