Kooks offer a premium stainless steel long tube header system that includes 1 7/8 diameter primary headers & high flow catalytic converters X-pipe that is designed to bolt-up to the Corsa CTS-V exhaust system that is not included.
Tube diameter: 1.875 inch
Collector diameter: 3 inch
X Pipe inlet diameter: 3 inch
x Pipe Outlet diameter: 2 1/2" Designed to attached directly to Corsa CTS-V Exhaust system
Primary tube length: 31 inches
Gauge 18 Gauge/ 304 Stainless Steel