Scorpion 2.75" Resonated GPF/OPF Delete Pipe For BMW G80 M3 / G82 M4The Scorpion Exhausts OPF Delete Package for the BMW G80 M3 & G82 M4 provides excellent value as an exhaust upgrade, whether used as a stand alone or combined with the Scorpion BMW G8X OPF Back Exhaust System. The package is available in both resonated (quieter) and non resonated (louder) configurations. By eliminating the factory OPFs, the exhaust system becomes significantly less restrictive. This results in a more efficient flow of exhaust gases,