In this episode of Vince in Shorts, Vince Roman shares the details on how and why the No Holds Barred (NhB) Harley exhaust increases the power band on high performance racing Harley-Davidson M8 and Twin Cam engines.
You may want these for your mildly modified Harley touring. However, if your bike is under 124ci or not a high compression, high revving race pipe, you will not reap the benefits of the design of these systems.
