Material: Multi-Layer Steel Manufacturer Part Numbers: 12622033, T598129, 12585673, 12639249, 12573460, 12630223 OEM Numbers: 12622033, T598129, 12585673, 12639249, 12573460, 12630223 Compatibility: Designed for LS1, LS6, LQ4, LQ9, 4.8L, 5.3L, 5.7L, and 6.0L Gen 3 III LS engines Design: Full set gaskets including head gaskets, valve cover gaskets, oil pan gasket, water pump gasket, front cover gasket, rear cover gasket, valley cover gasket, damper seal, rear main seal, oil filter adapter gasket, and knock grommet Constructed from multi-layer steel, this LS9 head gasket set is built to handle the demands of performance applications.The components are engineered to provide sealing and proper alignment during engine , making it a suitable replacement for damaged or worn gaskets.It supports a range of Gen 3 LS engine builds, offering compatibility across multiple engine variants commonly found in various vehicle platforms. This item is a third-party substitute.Use of brand names is limited to indicating which devices it supports.