The polished 304 Stainless Steel Header, incorporates the same "four-pipe into two-pipe into one-pipe" (Tri-Y) design as our mild steel version to optimize exhaust gas scavenging characteristics and horsepower output, while improving the exhaust note significantly and retaining both the factory catalytic converter and stock oxygen sensor. Engineered as a bolt-on installation, this header features 304-grade stainless steel tubing, with 409-grade stainless steel cast flanges and TIG-welding throughout for positive gas sealing. The selection of stainless steel offers reduced weight and increased corrosion resistance in harsh operating environments. This beautiful, polished stainless steel header is a show-stopper and is guaranteed to gather its share of looks!