Parts & Accessories Spare parts (Yukon - Tahoe - Sierra - Silverado) (2007 - 2014) . Of course, the blow-off valve is installed with the Y-pipe. . The Y-pipe is custom-made, heat-resistant. . The blow-off valve comes with a vacuum device and two remotes. . Note: The Y-pipe has not been used much, only for light use. I don't have a picture of it installed in the car. For sale to the highest bidder, please only serious buyers contact. (Contact via WhatsApp)