Peace, mercy, and blessings of God be upon you. For sale: a Wye catback with a Bolt electronic muffler and device. It was on a Sierra 2017. The sale is for the complete set. And to clear my conscience, I believe there is a leak, and the sale is as-is, I do not guarantee anything. Because I removed the items as soon as I bought the car. The current offer is one thousand riyals for all the items. There is a video of the catback sound.