Long Tube Header For 2004 Pontiac GTO 5.7L LS1 By OBX

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" OD Port Shape: Circle Port ID: 1.65" ID Collector: 3" OD Outlet: 2.5" OD Main Piping Size: 2.5" OD O2 Bung: 4 EGR: No Air Injection: No Flange Thickness: 0.40". T304 Fully Stainless Steel Dual T.I.G