997 Sport Catalytics, 200 cell (U-Design) for vehicles without PSE

200 cell, HJS tri-metal, HF (High Flow) HJS catalytic cores with "U-Torque" design, manufactured by M in Germany. Only for vehicles without Porsche series sports exhaust system 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