FMF POWERCORE4 SLIP-ON MUFFLER This FMF POWERCORE4 slip-on muffler is made from the highest quality materials, and not only stands out from the standard silencer with its appearance. New for 2016 is an all new “Gun-metal” grey anodizing. The POWERCORE4 has been optimally tuned for improved sounds and performance characteristics. Installation only possible in combination with stock head pipes. The benefits: - Increased performance along with improved sound - Manufactured from high grade materials Removable noise reduction insert included. Can only be fitted in combination with original header. FOR CLOSED COURSE COMPETITION USE ONLY!