Cobra Speedster Slashdown Exhaust System For Harley Flfb/S / Fxsbs What sets the system apart is the Cobra PowerPort that allows you to retain the power of a 2-into-1 system without sacrificing the traditional shotgun style pipes. The exhaust system features full-length heat shields and aluminum billet end caps. Features These traditionally styled shotgun pipes also produce class-leading power gains Includes oxygen sensor bungs Heat shields with chromed billet tips Cobra PowerPort crossover technology that helps to increase overall power from idle to redline Speedsters deliver the kind of power increase you normally experience with a 2-into-1 system, while retaining the clean classic lines of a 2-into-2 pipe The system is equipped with oxygen sensor bungs so you can take advantage of your motorcycle's closed loop technology