FVD Brombacher - Porsche Header Set 997.1 and 997.2 GT3 / RS - 200 Cell HF Catalytics - For OEM Exhaust - BES 997 012 60SOur header catalytics for the GT3 is aimed at those who are looking for more torque in the mid range, a rich, deep exhaust growl and most importantly. high durability for track and street use. for cars with OEM side mufflers Manifold with 200 HJS "HF" Tri Metal catalysts By reducing the back pressure up to 20 (15kw) crank hp and 13 (15NM) crank torque can be achieved on a 997. 1 GT3 RS. Package Information Size: 54. 4 x 53. 5 x 14 cm Product weight