These Injen Charge Pipes for the F80 M3 and F82/F83 M4 are smoother flowing than the stock, compressed plastic pipes. These pipes replace the hot-side pipes leaving the turbos and into the top-mount intercooler. These high-grade 6061-T1 aluminum pipes are mandrel bent for better flow, which helps reduce turbo lag and improve throttle response. The CNC-machined flanges have beaded ends to prevent the pipes from slipping off under high boost. All of the factory mounting points are retained for a direct replacement for the stock S55 chargepipes.