This creates a reduction in cylinder back-pressure and improved exhaust gas velocity. These improvements free up lost horsepower and torque. An added benefit is a more performance oriented exhaust sound Fittings: GMC YUKON 4.8L 5.3L for GMC SIERRA 1500 99-01 Inlet: 1.75″ Outlet: 2.25″ Fitment: 2000-2001 GMC YUKON 4.8L 5.3L 2WD4WD 2000-2001 GMC YUKON XL 1500 5.3L 2WD4WD 1999-2001 GMC SIERRA 1500 2500 Package Content: 1 x Set of header exhaust systemgaskets and bolts as shown in the Picture
- Fitment: for 2000-2001 GMC YUKON 4.8L 5.3L 2WD4WD2000-2001 GMC YUKON XL 1500 5.3L 2WD4WD1999-2001 GMC SIERRA 1500 2500
- Primary Tube Diameter inlet: 1 5/8 inchPrimary Tube Gauge: 14 gauge
- Stainless Steel Exhaust HeaderAs the pictures shows
- Package includes:10 Spark plug boots included