For 2012+ 911 (991) with OEM or valved Porsche sport exhaust (pse). Facts: - equal length headers with motorsports merge collector. - 200 cell hd German hjs tri metal sport cats. - 2 3/4 tubing (70mm) - reduces thermal stress on the motor. - made in Germany power with software and bmc filters: - 991 (3.4l) = + 25 crank hp (15 kw) & + 18 crank torque (20 nm) - 991s (3,8l) = + 25 crank hp (15kw) & 18 crank torque (20 nm) our latest development for the 991 is aimed at those who are looking for more torque in the mid range, a rich, deep exhaust growl. These headers contain the latest hjs cats, they are nicknamed hd for high durability matrix design catalytic converters. They have a sm-matrix (winding of three flat and corrugated foils) and a special connection to the matrix sheath, which equates to extremely high durability for track and street use.

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.