As is clear in the picture, Y-pipe or catalytic converters with the exhaust that fits the engine, not emptied, clean. Reason for selling: installing full headers. Very clean, free of welding, and filled with original lead. Fits Yukon and Tahoe models 2007-2014. And Sierra and Silverado models 2007-2013. There are also original header heads, and the original filter for the same model is available. There is also the last muffler connection for Yukon and Tahoe models 2007-2014. All are free of welding or cutting, very clean.