This sale is for two Aluminium Alloy Anti Reversion Cones.

If you want these in stainless steel then see ebay item number 193900098141 

They will help overcome the problem of the negative exhaust pressure pulse pushing gases back into the cylinder through the exhaust port

These torque power cones will fit Harley-Davidson Evolution and Twin Cam style engines, all years.

These work great with un-baffled exhaust system's, to help gain some of the lost mid range power when drag pipes are installed.

These CNC machined cones slide right into the header pipe, require no permanent modification or extra port gasket.

They have precise angles for maximum effect to increase exhaust velocity, and fit both Big Twin and Sportster models.

If your model is not listed in the compatibility list then please message me the year and model letter code and I will check for fitment.