Duo-Fast HFN 880 O-ring Rebuild KitComplete O-ring Kit HFN 880C 880D Free shipping in the USAvailable Qty: 8Aftermarket MS-120-3Aftermarket 3D printed MS-120-3 Exhaust Seal For Duo-Fast MS-7664 Series MS-7664 A, C, D, E, Z RCN 60/225 RCN 75/300 DS 7664BP DCN 225/60 HFN 880 C, D CF-100A Available Qty: 10 Post navigation Duo-Fast HFN-880 O-ring Rebuild Kit Duo-fast MS-7664 parts