Aright my S550 friends!! Here it is. The best longtube header deal we've ever had! For anyone looking to get into a quality set of stainless steel longtube headers for the 2015-2020 Mustang GT at a great price you're definitely going to want to check this one out. The Stainless Power 1-7/8" x 3" headers with offroad connection pipes (factory connect) are all IN STOCK and being offered with FREE SHIPPING to the lower 48 states. These kits come complete with the headers, lead pipes, connection pipes, header bolts, 02 extensions (15-17 & 18+), aluminum silicone, coozies and a Stainless Works lanyard. View attachment 1610607 Not only will you see some really nice gains with these but you'll also experience a louder more aggressive exhaust tone. A custom tune is highly recommended so make sure to check out Lethal Performance's tune shop for awesome deals on custom tuned devices from Lund Racing, Palm Beach Dyno, Li Tuning and Racing as well as AED. HOW TO GET THIS DEAL? All you need to do is create an account on LethalPerformance.com if you haven't already and be logged into your account. Then follow the link below to the SW-SM15HOR headers and there ya have it! It's that simple. Stainless Power 2015-2020 Mustang GT 1-7/8" Long Tube Headers with 3" Off Road Lead Pipes (Factory Connect) If you have any questions regarding the Stainless Power headers or any of the other amazing deals we have this Black Friday / Cyber Monday please feel free to give us a call at 561-753-8105. Also make sure to check the video below where we show what's included in this header package.