MLS Exhaust Manifold Gasket Set With Bolts Compatible For Cummins ISL, ISL-G, QSL, ISC, QSC, 8.3L, 8.9L with Turbo oil drain gasket. Replaces OEM part # 5259851, 3937479, 3943191. Please match your part # to make sure you are purchasing the right parts. Note:- Recommend to Install copper Anti seize on bolt threads (not included) Kit Includes:- Exhaust Manifold MLS Gaskets Qty 6 Exhaust Manifold M10 bolts Qty 12 Turbo oil drain tube gasket. Any questions please contact us.