OBX Header Fits For 2004 2005 Dodge Ram 1500 Truck 4WD HEMI 5.7L Sizequare Port

T304 Fully Stainless Steel Dual T.I.G. welded construction for stronger hold  Accessories in photo are included  No installation instruction included in this kit, we recommend professional installation Manufacturer's Limited Lifetime warranty against manufacturer defects (Must fill out and return warranty card with a copy of the receipt and within 30 days of purchase date) Primaries: 1.75" Port Shape: Square Port ID: 1.4" Collector: 2.5" OD Outlet: 2.5" OD Main Piping Size: 2.5" OD O2 Bung: 4 EGR: 0 Air Injection: 0 Flange Thickness: .40"