Akrapovic Link-Pipe Set w/o Cat (Titanium) Porsche 911 Turbo/Turbo S (991)Akrapovic Link Pipe Set w o Cat (Titanium) Porsche 911 Turbo Turbo S (991) The next step from Akrapovi for the Porsche 911 Turbo Turbo S is the optional titanium link pipe set without cats, perfectly finished with a coating to offer greater durability without altering the look. Designed to create the best exhaust flow and offering a huge weight saving over stockwhen used in conjunction with the Slip Onthe link pipes increase power and give the car a