Material: rubber OEM NO.: 12575329 12558940 54340 8125753290 Compatibility: Designed for EXPRESS 1500 models from 2003 to 2007 and ENVOY models from 2003 to 2004 Temperature Resistance: Withstands temperatures up to 105℃ with low vapor emission Design: Engineered for fitment between the cylinder head and valve cover to a , leak-free seal : Meets or exceeds specifications The Engine Cylinder Head Gasket is constructed from rubber material to support consistent engine .It is designed to maintain integrity under operating temperatures, contributing to long-term.The specified OEM numbers compatibility with selected vehicle models, allowing for straightforward identification and installation.This gasket supports proper engine function by sealing critical components, helping to prevent leaks and maintain compression.Suitable for use in applicable EXPRESS 1500 and ENVOY vehicles within the specified model years. This is not an OEM product.Brand/model references are included solely to assist with compatibility identification.