2L BLACK EXHAUST MUFFLER HEAD HONDA XR50 CRF50 SDG SSR 50 70 107 110 125CC EX07H BRAND NEW D STYLE HIGH PERFORMANCE BIG BORE EXHAUST EVERYTHING SHOWN IN THE PICTURES WILL BE INCLUDED. NO HARDWARE (BOLT OR SCREW)IS INCLUDED. Inlet ID: 28mm Outlet ID: 37mm