OBX Performance Exhaust Manifold Shorty Header 88-95 Chevy Silverado Sierra 5.0L 5.7L High quality T-304 stainless steel for Best Durability and Strength Gaskets & Hardware included as shown Precision CNC machined flanges with DUAL-TIG welded construction Backed by Limited Lifetime warranty from manufacturer defects OBX Genuine Products Design and Quality of OBX U.S.A