S&S Cycle S/O PERF MUFFLER DYNA 55-6005 95-UP DYNA Low restriction, high performance Cost-effective performance upgrade best horsepower/dollar ratio Maintains a smooth power curve while delivering excellent low and midrange torque makes adjustments to the fuel delivery system minimal and straightforward Show chrome finish NOTE: It may be necessary to rejet the carburetor or recalibrate the fuel injection system for best performance when a change is made in the exhaust system.