Remus Cat-back System With Integrated Valve - BMW F20 | F21 M135i 340i We won’t go into torque

We won’t go into torque bias ratios or the concept of how torque biasing diffs work at this point

Replaces catalytic converter

Front exhaust "H-Pipe" with Metallic catalytic converter

turbulent flow which does not enable the airfoil to operate as efficiently as possible

superior finish

Remus Cat-back System With Integrated Valve - BMW F20 | F21 M135i 340i We won’t go into torqueCat Back System for BMW 1 Series F20 F21 and 1 Series F20 LCI F21 LCI consists of: sport exhaust centered for left right system front section front silencer L R tip set with integrated valve. The activation of the valve is carried out using the original actuator via the vehicle onboard electronics. Original tube 80 mm REMUS tube 84 mm Features Aggressive racing sound Shot blasted surface, 100% stainless steel Performance increase, low back pressure