HKS now offers this muffler system for cars in the 800-1000hp range! The Racing Muffler is the lightest system and is 40% lighter than the Hi-Power exhaust. It utilizes the highest flowing muffler HKS offers. This muffler system utilizes a slip-on/latch design with polished stainless piping and a lightweight titanium muffler. The tip is 115mm diameter and includes a removable inner silencer for pit area use.