For 2010 – 2015 Chevrolet Camaro SS/ZL1 6.2L V8. Header Type:Shorty / Short Tube. Collector Diameter: 2.5 in. Head Flange Thickness: 12MM. Material: 304 Stainless Steel. Constructed of lightweight 1-7/8? Diameter, 18-gauge, mandrel bent 304 stainless steel primary tubes maximizing strength and durability. Merged collectors for maximum flow and increased exhaust velocity. 3/8 thick precision water jet cut flanges for less warping, maximum sealing surface, and better seal. Hand blended welds at the flange entry for maximum flow and better performance. Quality welds for strength, longevity, and good looks. 100% hand welded construction.