Feature 1Fitment: Built to meet OE specification, and strictly followed factory standard control, perfect replacement for Chevy Small Block Big Block LS2 LQ4 LQ9 LS6 L92 L99 L33 LR4. 2OEM: The OEM of this master adapter set is 551156 for reference, please check the part number of your item before purchasing. 3Packing Number: This package includes 6 different adapter fittings for oil pressure or coolant temperature sensors and 6 gaskets accessory. 4Lasting Lifespan: The sensor adapter is made from stable metal material, which is anti high temperature and wear resistant, adequately maximizing the durability and serving time of the adapter. 5Convenient to Install: Our master adapter set is an ideal and reliable aftermarket replacement part set, which can fit into all LS series engines and perform well.SpecificationItem Type:LSMasterAdapterKitOEM:551156M16-1.5 External thread to 1/8in NPT (oil pressure) M16-1.5 External thread to 1/4in NPT (oil pressure) M12-1.5 External thread to 1/8in NPT (coolant temperature sensor) M12-1.5 External thread to 3/8in NPT (coolant temperature sensor) Lengthening M12-1.5 external thread to 3/8in NPT (coolant temperature sensor) M12-1.5 External thread to 1/2in NPT (coolant temperature sensor)Fitment:Replacement for Chevy Small Block Big Block LS2 LQ4 LQ9 LS6 L92 L99 L33 LR4 .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List6 x Adapter6 x GasketNote1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!