Seguler 1999-2005 Chevy GMT800 V8 Engine Truck Stainless Steel Manifold Headers Y-Pipe Gasket

-Fitment:
2001-2004 GMC Yukon(except 2003 GMC Yukon SLT Sport Utility 4-Door 5.3L)
2000-2004 GMC Yukon XL 1500
1999-2005 GMC Sierra
2002-2005 Chevy Avalanche 1500
1999-2005 Chevy Silverado 1500
2000-2004 Chevy Suburban 1500
2000-2004 Chevy Tahoe
-Packing:
1X Header Manifold Kit
All necessary installation hardware (as shown in the picture).
-Air Intake:
Filter: 4.00" Inner Diameter, 10.50" Overall Height
Aluminum Charge Pipe: 3.75" Inlet / Outlet
High Heat Tolerance Silicone Hoses: 3.75" Inlet / Outlet
-Header Exhaust:
Inlet/ Outlet: 1.875" (8 X Manifold Ports)/ 2.500" (Outer Diameter)
Main Piping Diameter: 2.500
-Feature:
1. To make your engine perform better, it's important to get more air in and more exhaust out. That's where exhaust headers come in - they're the first part of an exhaust system that helps improve performance by controlling the airflow, instead of using the restrictive exhaust manifold that came with your car.
2. Headers give each cylinder its own mini exhaust pipe, which means they prevent interference between cylinders and reduce back pressure that can happen with regular exhaust manifolds. When cylinders don't have to compete with each other to expel their exhaust, they can push more power through the wheels and make the vehicle go faster. When combined with a high performance cold air intake and a cat-back exhaust system, a header system removes all restrictions from your engine so it can perform at its best.