EXHAUST PORT TORQUE CONES FOR BIG TWINS AND SPORTSTERS.
Improves power by increasing the exhaust gas velocity.
Helps to reduce exhaust reversion.
Simple installation requiring no permanent modification.
Great for use with unbaffled exhaust that require some type of back pressure to run right.
Precise angles for maximum effect.
Extra exhaust port gaskets are not required.
Fits all Harley-Davidson Evolution models, all years and Twin Cam 1999-Later
Torque cones are commonly used to prevent these from happening. Torque cones are causing the exiting exhaust gasses to speed up (venture effect) which stops it from being sucked back into the engine. It is always a good idea to install torque cones to insure great performance of your engine.