BMW 5 Series M5 + M5 Competition 4.4l Twin Turbo F90 LCI (OPF/GPF Equipped Cars) YOC: 2021 - 2024 Part: Cat-back Info: Cat Back System inc. OPF/GPF Bypass with Cerakote Black GT-100 Trims - Required Stage 2 ECU Software or OPF/GPF Bypass Module - For Vehicles with Flange Connection to OE Downpipes tailpipe design: Quad 100mm GT100 pipe diameter: 80mm /3,15inch EC-approved: No Race system: No Valvesonic: No Part no.: SSXBM1228