Up for sale is PRO CIRCUIT 2023 Gas-Gas EC 250 WORKS EXHAUST PIPE KTM/HUS 752030. Read title carefully to know what you are getting. Catalog description�.. The original Pro Circuit Works pipe offers unparalled performance and power for every two-stroke application. Increased horsepower and torque gains will quickly be noticed across the entire rpm range. The unplated, oiled metal finish requires some maintenance, but really gives your bike that "Works Look".