Header Collector Kit 3.00 " reduced to 2.50 Inch 409 Stainless Steel WHCK300-250-409-SS Wesdon Collector HEADER COLLECTOR KITS 6 Pcs Set FITS A 2.5" EXHAUST PIPE THERE ARE (2) TWO FLANGES 2 GASKETS AND 2 COLLECTORS TO A BOX 2.5 inch Diameter 7 Inches long Fits a 3.00 Inch 3 Bolt Header