GMC Sierra 2018 Peace, mercy, and blessings of God be upon you. I have complete Sierra 2018 antennas. - Sierra headers from Bullet company, original. - Y-pipe for the headers from Bullet company. - Electronic cat-back from Bullet company. - Volant oiled sports filter. Of course, all parts are from the same company, Riyadh branch. All parts are original, and I have the purchase dates. The parts have been installed on the car for less than 6 months, and they are all clean, guaranteed for use and maintenance, and still under the company's warranty. The warranty has 6 months remaining. Guaranteed against welding or any defect. Selling as a complete set or in parts. Serious buyers can contact me: ( Phone number appears when clicking the contact button )