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 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. We have used SW headers on all of our S197 and S550 Mustang projects with outstanding results. Call Beefcake Racing 1-855-827-7223 from 9am-10pm EST for more info and best pricing.