These headers and cats are perfect for those who want to run sport cats without a software program. Our latest development for the GT3 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. By reducing the back pressure up to 20 (15kw) crank hp and 13 (15nm) crank torque. - for cars with OEM side mufflers - manifold with 200 hd-catalysts

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.