The original Pro Circuit Works Pipe offers unparalleled 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". Features Include: Stamped AKDQ high quality carbon steel construction Hand welded and pounded seams Reinforced mounting brackets and stinger Made in the USA