100% blue proof the most coveted 2-into-1 performance pipe for Harleys ⢠New and improved with the addition of blue-proof technology over the entire pipe ⢠From its 2-1/8â header and collector heat shields, to its new full-coverage megaphone heat shield, Pro Pipe BP carries on the heritage of track-proven performance, now with a blue-proof chrome finish ⢠Includes mounts for factory O2 Sensors ⢠Made in the U.S.A.