Package Include - 2 x Multiple Layers Steel (MLS) Head Gasket, 1 x Valve Cover Gasket, 2 x Intake/Exhaust Manifold Gasket, 16 x Valve Stem Seals, 10 x O-rings, 2 x Small Gaskets. Fitment - Engine cylinder head gasket set compatible with 2014-2019 Chevy Silverado 1500 5.3L, 2014-2018 GMC Sierra 1500 5.3L, 2015-2017 Chevy Tahoe, 2018-2020 Tahoe 5.3L, 2016-2018 Chevy Suburban, 2015-2020 GMC Yukon 5.3L, 2015 2019-2020 Suburban 5.3L, 2015-2019 Yukon XL 5.3L, 2019 Sierra 1500 Limited Replacement OE Number - HGS4308, HS26744PT, HS54996, HS8429, ‎12657968, 12622325. Please confirm that the old part number matches the one listed before making a purchase. Superior Quality - Our cylinder head gasket sets are made of 201 or 353 Stainless steel , including RTV Silicone, MLS metal, flexible graphite material. Excellent resistance to high temperature, high pressure, and corrosion, ensures maximum compression ratio allowing the engine to maintain an excellent seal for a longer period of time. Easy to Install - Automotive replacement head gasket sets designed by the manufacturer's in-house engineering team. Strict tolerance testing. Plug-and-play, direct fit to ensure a perfect match with your model. Quick and easy installation. KAX Head Gasket Set Fit for Silverado 1500 2014-2019, Suburban 2015-2020, Tahoe 2015-2020; for Sierra 1500 2014-2018, Sierra 1500 Limited 2019, Yukon& Yukon XL 2015-2020 OE:HGS4308