For 2012+ 981 facts: - equal length headers with motorsports merge collector. - 200 cell hd German hjs tri metal sport cats. - t316 lightweight stainless. - primary diameter 45mm outer , 42mm inner - each header weighs 13 lbs. (6 kg) - reduces thermal stress on the motor. - made in Germany please add 2 engine to header gaskets when ordering - 2 qty 99711110731 power: - 981 (2.7l) = + 12 crank hp (9 kw) & + 11 crank torque (15 nm) - 981s (3.4l) = + 16 crank hp (12kw) & 15 crank torque ( 20 nm) our latest development for the 981 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. Want more detailed information on how our headers are unparalleled in the aftermarket? Simply open up our additional .pdf file.

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.