Catted Long Tube Header Fitment For 00 to 03 Chevy/GMC 1500 4.8L/5.3L 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: 1.75" Port Shape: Round Port ID: 1.6" Collector: 2.5" Outlet: 2.5" Main Piping Size: 2.5" O2 Bung: 6 EGR: 1 Air Injection: 0 Flange Thickness: .40"