2009-15 Stainless Works, Cadillac CTS-V Headers. All tubes are CNC mandrel bent for optimal flow. Made from 304 stainless steel for maximum corrosion resistance. Starting with a CNC cut 3/8" thick flanges into 2” primaries and 3" lead pipes with High-Flow Catalytic Converters. For use with Stainless Works Performance Connect CTS-V exhaust. These are TIG welded for strength and durability. These kits come with a lifetime warranty and proudly made in the USA.