Performance Long Tube 1 7/8" Stainless Steel Exhaust Headers Manifold System Kit 09-15 Dodge Ram 5.7L V8 Hemi Pickup Truck 1-7/8" Long Tube Headers. Tube Diameter: 1-7/8" (47mm) Collector Diameter: 3" (76mm) Improve Sound, Horsepower & Torque Mandrel-Bent For Maximum Performance TIG Weld & Polished Stainless Steel