Pontiac Solstice Long Tube Tri-YWe build our headers with 14 gage (. 083 wall) mild steel tubing and 3 8" thick CNC laser cut header flanges for superior strength and longevity. All of our Mandrel bending, fitting, welding and surfacing are done in house. Headers may be available in 304 stainless steel. Call for more info. CHROMEX ceramic coated inside and out is available from Performance Coatings.