Stainless Works headers and exhaust provide huge increases in performance when replacing oem stock manifolds. Great way to add power when using cold air intakes and performance ECU tunes. Stainless Works Best Seller is the 1-7/8" long tube headers and 3" Retro Chambered Exhaust for the 2011-2019 Mustang 5.0 GT, this system makes incredible power with a nostalgic Mustang sound and can be found on some of the fastest S550 Mustangs on the planet. Stainless Works is a manufacturer of premium 304 stainless header and matching exhaust systems. Their components are designed to provide customers with exact fit to stock and modified vehicles. Call Beefcake Racing 1-855-827-7223 from 9am-10pm EST for more info and best pricing.