Feature 1Fitment: Engineered and manufactured specifically for meeting original standard, perfect replacement for Dodge Ram 5.9 6.7, for Cummins 20032019. 2OEM: The OEMs of this exhaust manifold bolt studs are 3901448 and 3990120, please check the part number of your item before purchasing. 3Better Driving Experience: The exhaust manifold bolt studs can reduce the noise generated when driving, thus improving the driving comfort. 4More Durable: This exhaust manifold bolt set is made from firm metal alloy material, which has strong anti rust ability, and can be used stably for a long time. 5Direct Replacement: After a variety of performance tests, this exhaust manifold bolt conforms to OEM standards, and can be installed without change, which is convenient and fast.Item Type: Exhaust Manifold Bolt .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; }OEM: 3901448, 3990120Fitment:Replacement forDodge Ram 5.9 6.7 forCummins 2003-2019Package List12 x Exhaust Manifold BoltNote1. 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!