Milltek Large Bore Downpipe and Hi-Flow Sports Cat - Requires Stage 2 ECU Remap - Fits to Milltek Sport and OE Cat Back Systems - 3 Series - G20 M340i XDrive Saloon (OPF/GPF Models Only) - 2019 - 2021 -
Mandrel bending ensures constant radius bends for optimised gasflow, and bore diameters are carefully enlarged over stock to ensure ultimate performance without the loss of mid-range torque. All of the Milltek exhaust systems endure a comprehensive acoustic development process to deliver a tone that is sporty and crisp, without ever inducing NVH, drone or cabin resonance.