Fi Exhaust Valvetronic Titanium Muffler + Dual Tips with Carbon Fiber Ceramic Coating Black Stainless Insert (Retains OEM Valve Settings - No Remote) - Porsche 991.1/ 991.2 GT3/ RS 2013-2019Experience the pinnacle of lightweight performance and motorsport acoustics with the Fi Exhaust Valvetronic Titanium Muffler + Dual Tips with Carbon Fiber Ceramic Coating Black Insert for the Porsche 991. 1 991. 2 GT3 and GT3 RS. Part of Fis Titanium Signature Series, this system is engineered from premium, ultra lightweight titanium to deliver exceptional heat resistance, reduced weight, and sharper throttle response. The dual tip design features