FVD Brombacher - Porsche Header Set 997.1 and 997.2 GT3 / RS - Catalytic Bypass - For OEM Exhaust - BES 997 010 60SOur header catalytics for the GT3 is aimed at those who are looking for more torque horsepower in the mid range and top end, a rich, deep exhaust growl and most importantly durability. high durability for track use. for cars with OEM side mufflers Manifold without catalytics. By reducing the back pressure up to 20 (15kw) crank hp and 13 (15NM) crank torque can be achieved on a 997. 1 997. 2 GT3 RS. Package Information Size: 44 x 44 x 28 cm Product