as advertized:
2005-2008 Chevy Corvette Corvette C6 6.0L V8.
Specification.
Primary Port Diameter: 1.70 Inch I.D.
2.50" All The Way From Collector To X-Pipe.
100% T304 Stainless Steel..
Flange Thickness:3/8 Inch.
Runner Wall Thickness: 16 Gauge(1.5mm)