This Engine Core Plug-Expansion Plug is made by Dorman/AutoGrade and has the part number 555-038. It is a high-quality replacement part that is perfect for your car's engine. This product is designed to provide reliable performance and durability, making it an excellent choice for your automotive needs. It is easy to install and is compatible with a wide range of car models. If you're looking for a quality Engine Core Plug-Expansion Plug, look no further than Dorman/AutoGrade.