Maximizer Stainless Catted Header Fitment For 00 to 03 Chevy Avalanche/ Suburban/ Tahoe/ GMC Yukon 2WD/4WD 4.8L/5.3L

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"