2016 For sale: Bahraini custom exhaust system (Qazouz Mart) with two outlets, right and left, at the bumper corners. It is sound and new, free from leaks and cracks. Ready to install on a Sierra (single cab) from 2014 to 2018. You can install it with long tube headers or directly with the stock headers, it comes with pipes. It also fits extended cab, crew cab, Tahoe, and Suburban of the same models, but requires pipe extensions. Selling to the highest bidder. May God bless us and you.