Manufacturer SKU: POR.991.1.VSES.AG Porsche 911 Carrera / S / GTS (991.1) – Valved Exhaust System Rich F1 Sound • Lightweight Construction • OEM-Style Valve Control Overview Welcome to the Valvetronic Designs Catback Exhaust System for the Porsche 991 platform. Engineered from the ground up, this system is built to deliver a truly rich F1-inspired sound while maintaining comfort and refinement when cruising with the valves closed. Featuring a large center X-pipe, the system creates a smooth exhaust flow, balancing aggression with sophistication for the perfect 991 soundtrack. Sound Dynamics - Valves Open – Exhaust gases flow with minimal restriction, unleashing a sharp, high-pitched F1-style sound that transforms your Porsche into a motorsport machine. - Valves Closed – Sound is tamed significantly, reducing unwanted cabin frequencies and creating a calm, refined experience for daily driving. - The system strikes the perfect balance between raw emotion and everyday usability, offering maximum enjoyment without compromise. Features - Available in Anodized Gold T304 Stainless Steel or Blue Burnt Titanium - Vacuum-actuated exhaust valves with controller for OEM-like operation - Standalone valve control option for vehicles without factory valves - 21.8 lbs lighter than the factory exhaust (T304 Stainless version) - Fully mandrel-bent piping for maximum exhaust flow - Precision TIG welds for strength and durability - 100% reversible – always able to return to stock configuration Fitment - 2012 – 2016 Porsche Carrera / Carrera S / Carrera GTS - 2014 – 2016 Porsche Targa 4 / Targa 4S / Targa 4 GTS - Also fits convertible models