Engineered for performance, style and sound. Improves torque and horsepower. Removes OEM catalytic converter to reduce heat and improve rider comfort. Fits directly under factory heat shields to maintain OEM styling. 18 and 12 mm O2 bungs welded into header primaries for street-legal applications. 16-gauge 1.75" primaries. Uses the existing crossover pipe. 4.5" HP Plus compliant mufflers deliver Khrome Werks signature aggressive sound. End caps available (sold separately). Tune the sound and performance with Khrome Werks Cone Reducers and Sound Kits (sold separately). Made in the U.S.A. NOTE: Icon SR systems do not come with end caps.