997 Catalytic Bypass (U-Design)

Catalytic Bypass pipe U-Torque design, manufactured by M&M in Germany._x000B_ _x000B_The "U-Torque" design compensates for the backpressure loss while running without cats. The design minimizes the loss of low end torque and adds 10-15 ft-lbs of torque in the mid and top range of the rpms. _x000B__x000B_Why settle for the traditional cross over cat design when you can add torque in the mid-range and minimize the loss of torque down low where the 997's need it most!!_x000B__x000B_ECU software is necessary !_x000B__x000B_Fits: Carrera 4S, 3.8L, 261kW (05-08), Carrera 4, 3.6L, 239kW (05-08), Carrera S, Carrera