This is the FX Royal Racing Engines EFRA 2108 Tuned Pipe. This polished pipe is EFRA approved and is recommended for applications that require more bottom end power. The FX 2100 Tuned Pipe (FXE659501) is recommended for higher RPM applications.
- FXE659704: Medium Manifold
- Short: Suggested to be used for tracks with long main straights and to achieve the highest RPM but lower performance from bottom.
- Medium: Suggested to be used for medium or standard tracks.
- Long: Suggested to be used for short tracks where the performance from bottom is required but the RPM will be lower.