Rolls Royce Cullinan - 250 Cell Sport Cat Downpipes**uses OEM Actuators** **the 250 Cell Sport Cat Replacements for the primary cat and OPF GPF replacement may cause CEL and require ECU tuning** Made of T309 (1. 4828) Grade Stainless Steel and Hand polished to a mirror finish. This version includes custom hand sewn heat blankets to reduce under hood temperatures, protecting the surrounding body, hoses, and painted surfaces from residual heat damage. These High Performance Sports Catalytic Converters