Long Tube Header For 2002-2006 Chevy Trailblazer 4.2L 6Cyl. By OBX-RS

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 5/8" OD Port Shape: Oval Port ID: 1.25" ID x 1.95" ID Collector: 2" OD Outlet: 2.75" ID Main Piping Size: 3" OD O2 Bung: 1 EGR: No Air Injection: No Flange Thickness: 0.40"