【Vehicle Fitment & Part Reference】Designed as a direct replacement for MAHLE HS54442, this engine cylinder head gasket set fits GM 5.3L V8 engines including 2005–2007 Buick Rainier; 2007–2009 Chevy Avalanche; 2007–2010 Chevy Silverado 1500, Suburban 1500, Tahoe; 2006–2008 Trailblazer; 2005–2006 Trailblazer EXT; and 2005–2009 Saab 9-7X. 【Additional GM Applications】Compatible with 2005–2009 GMC Envoy, 2005–2006 Envoy XL, 2005 Envoy XUV, 2007–2010 GMC Sierra 1500, 2007–2010 GMC Yukon & Yukon XL 1500, and 2005–2006 Isuzu Ascender, all equipped with 5.3L V8 engines. Always confirm engine size and year before ordering. 【OE-Grade Sealing Performance】Manufactured to OE specifications, this head gasket kit is built from premium materials and factory-tested for heat resistance, pressure stability, and long-term sealing performance. Designed to maintain proper combustion sealing and engine reliability under demanding operating conditions. 【Complete Head Gasket Set】Includes all necessary gaskets and seals for a proper cylinder head service: head gaskets (2), intake and exhaust manifold gaskets, valve cover gaskets and grommets, valve stem seals, injector O-rings, EGR gaskets, knock sensor seals, water channel gaskets, and related O-rings—everything required for a complete, professional repair. 【Quality You Can Trust】Engineered and manufactured in Taiwan under strict quality control standards, each gasket set is inspected for accurate fitment and consistent material performance. Designed for dependable installation, long service life, and confidence you can rely on during engine repair or rebuild. Manufacturer warranty for 1 year from date of purchase