What the hell is a torque cone you may ask? What flavors are available? Samson stainless steel Torque Cone are a bolt-in device that increases outgoing exhaust velocity, while at the same time preventing exhaust gas reversion. All dual exhaust-pipe exhaust systems can derive a profound performance benefit from the installation of Samson Torque cones. Simply put, Torque Cone create a profound extraction effect in the exhaust head-pipe, which in turn ensures a full, clean and compete incoming fuel-air charge regardless of valve timing and or cam timing overlap! From Bonneville to your local drag strip, motorcycles riders are wining races, and scaring non biker old ladies with Samson Torque Cones. These are the Torque Cones your mother warned you about!! Buy two sets and receive a 10% discount!