MLS Exhaust manifold gasket set With Studs, Stainless Nuts for Cummins ISL, ISL-G, QSL, ISC, QSC, 8.3L, 8.9L with Turbo oil drain gaskets Replaces OEM part # 5259851, 3937479, 3943191. Please match your part # or contact US with ESN to make sure you are purchasing the right parts Note: Need to remove factory spacers when installing these studs, also recommend to install copper Anti seize on stud threads (not included) Kit Include Exhaust manifold MLS gaskets Qty 6 M10 Studs Qty 12 M10 Stainless Nut Qty 12 Turbo oil drain tube gaskets Any questions please contact us. Note: All manufacturers names, part numbers, and symbols are registered trademarks of these manufactures and supplied for reference purposes only. PB Sales, Inc. is in no way implying that any part listed is the product of these manufacturers or that we are affiliated with any of these manufacturers .