KYOSTAR Titanium Valved Catback Exhaust System for Porsche 911 992 3.0TT Upgrade your Porsche 911 992 3.0TT performance platform with the KYOSTAR Titanium Valved Catback Exhaust System. Designed for selected Porsche 911 Carrera, Carrera S, Carrera 4, Carrera 4S, and Targa models, this lightweight titanium exhaust system improves exhaust flow efficiency while delivering a sharper, more aggressive performance exhaust tone. Constructed from premium titanium with precision TIG