This header system is a single piece made of stainless steel and entirely tig welded, the system is made by 2 header pipe, a 2 into 1 and a central link pipe. It is equipped with two connections for the O2 sensors on the header pipes and one on the central link pipe for the rear sensor on models 2021 to present. The original heatshields fit straight on to these headers. These headers are without a Catalytic converter, thus intended for race use only.