Here is a used original exhaust system from a 2011 Chevrolet Colorado LT Crew Cab with the 3.7 five-cylinder engine. This includes everything from the pipe that connects to the Catalytic Converter, all the way back to the exhaust tip. You get the front pipe, the muffler, and even a highly-polished OE exhaust tip.
This system has about 30,000 miles on it. Since it was cut it in half, it will be necessary to weld it back together. It is in very good condition. It was removed in order to upgrade to a performance exhaust system.
Here is the link with more information:
2011 Chevy Colorado Lt Crew Cab w 3 7L Engine Exhaust System Used | eBay