Constructed out of superior quality 2.5” mandrel bent 16-gauge T-304 stainless steel to ensure the highest quality and reliability, the 2.5" High Flow Catalytic Convertors replace your vehicles restrictive factory catalytic converter with a new technology in high-flow converter element. The new converter technology flows 40% more than most other cats currently on the market. Significant gains in exhaust flow makes the 2.5" High Flow Catalytic Convertors a perfect fit for both naturally aspirated and supercharged/turbocharged Infiniti G35 vehicles.