Y-pipe custom (Bin Merdhas) Welded to it an electronic 3-inch blockage. Clean, free of leaks. Never shot and installed on a car without programming. Fits Yukon, Tahoe, and Sierra from model 2015-2020, while Sierra and Silverado from model 2014-2018. Used for 3 months. Without a device, I will just hand you the Y in front of you in the picture.