Only for vehicles with Porsche standard sports exhaust system 200 cell, hjs tri-metal, hf (high flow) hjs catalytic cores with u-torque design, manufactured by m in Germany. The u-torque design compensates for the backpressure loss while running the high flow 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. Why settle for the traditional cross over cat design when you can add more torque in the mid-range and minimize the loss of torque down low where the 997 's need it most! Please note: these fit the OEM mufflers and Porsche sport exhaust (pse) mufflers. Tech tip:add one of our installation kits FVD mk 997300

This item may need to be sourced from Germany and would take 2-4 weeks to arrive. Once ordered it cannot be canceled. Please call to check stock or request expedited shipping.